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نشرة الممارس الصحي | نشرة معلومات المريض بالعربية | نشرة معلومات المريض بالانجليزية | صور الدواء | بيانات الدواء |
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Matroda® contains Metoprolol Tartrate, which belongs to a group of medicines called beta blockers.
Matroda® is used to treat:
· high blood pressure
· angina pectoris ( pain in the chest caused by blockages in the arteries to the heart)
· irregular heart rhythm (arrhythmia)
· the symptoms caused by an overactive thyroid gland (thyrotoxicosis)
Matroda® is also used to prevent:
· heart damage and death due to heart attacks
· migraine
Do not take Matroda® if you:
· are allergic to Metoprolol, other beta-blockers or any of the other ingredients of this medicine (listed in section 6).
· suffer with heart conduction or rhythm problems.
· have severe or uncontrolled heart failure.
· are in shock caused by heart problems.
· suffer with blocked blood vessels, including blood circulation problems (which may cause your fingers and toes to tingle or turn pale or blue).
· have a slow heart rate or have suffered a heart attack which has been complicated by a significantly slow heart rate.
· suffer from a tight, painful feeling in the chest in periods of rest (Prinzmetal's angina).
· have or have had breathing difficulties or asthma including COPD (Chronic Obstructive Pulmonary Disease causing cough, wheezing or breathlessness, phlegm or increase in chest infections).
· suffer with untreated phaeochromocytoma ( high blood pressure due to a tumour near the kidney).
· suffer from increased acidity of the blood (metabolic acidosis).
· have low blood pressure.
· suffer with diabetes associated with frequent episodes of low blood sugar (hypoglycaemia).
· have liver or kidney disease or failure.
· are given other medicines for blood pressure by injection especially verapamil, diltiazem or disopyramide.
Warnings and precautions
Talk to your doctor or pharmacist before using Matroda® if you:
· have a history of allergic reactions, for example to insect stings, foods or other substances,
· have diabetes mellitus (low blood sugar levels may be hidden by this medicine)
· have controlled heart failure.
· have a slow heart rate or blood vessel disorder.
· suffer from treated phaeochromocytoma (high blood pressure due to tumour near the kidney)
· have or have suffered from psoriasis (severe skin rashes)
· have liver cirrhosis
· are elderly
· have myasthenia gravis
· If you suffer from dry eyes.
Anaesthetics and surgery
If you are going to have an operation or an anaesthetic, please tell your doctor or dentist that you are taking Matroda®, as your heart beat might slow down too much.
Children
Do not give this medicine to children.
Other medicines and Matroda®
Do not take Matroda® tablets if you are already taking:
· monoamine oxidase inhibitors (MAOIs) for depression
· other blood pressure lowering medicines such as verapamil, nifedipine and diltiazem
· disopyramide or quinidine (to treat irregular heartbeat (arrhythmia)
Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines.
· medicines used to treat stomach ulcers such as cimetidine
· medicines used to treat high blood pressure such as hydralazine, clonidine or prazosin
· medicines used to treat irregular heart rhythm such as amiodarone and propafenone
· medicines used to treat depression such as tricyclic or SSRI antidepressants
· medicines used to treat epilepsy such as barbiturates
· medicines used to treat mental illness such as phenothiazines
· anaesthetics such as cyclopropane or trichloroethylene
· medicines used to treat some cancers, particularly cancer of the kidney such as aldesleukin
· medicines used to treat erectile dysfunction such as alprostadil
· anxiolytics or hypnotics (e.g. temazepam, nitrazepam, diazepam)
· indometacin or celecoxib (Non-Steroidal Anti-Inflammatory Drugs (NSAIDs))
· rifampicin (antibiotic) or terbinafine (antifungal)
· oestrogens such as a contraceptive pill or hormone replacement therapy
· corticosteroids (e.g. hydrocortisone, prednisolone)
· other beta-blockers e.g. eye drops.
· adrenaline (epinephrine) or noradrenaline (norepinephrine), used in anaphylactic shock or other sympathomimetics
· medicines used to treat diabetes
· lidocaine (a local anaesthetic)
· moxisylyte (used in Raynaud's syndrome)
· medicines used to treat malaria such as mefloquine
· medicines used to prevent nausea and vomiting such as tropisetron
· medicines used to treat asthma such as xanthines such as aminophylline or theophylline
· medicines to treat migraines such as ergotamine
· medicines used to treat heart conditions such as cardiac glycosides e.g. digoxin
· medicines used to treat rheumatoid arthritis such as hydroxychloroquine
· diphenydramine (sedative antihistamine).
Matroda® and alcohol
You are advised to avoid alcohol whilst taking this medicine.
Alcohol may increase the blood pressure lowering effect of Metoprolol Tartrate.
Pregnancy and breast-feeding
Matroda® tablets are not recommended during pregnancy or breastfeeding. If you are pregnant or breastfeeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.
Driving and using machines
Matroda® may make you feel tired and dizzy.
If affected, patients should not drive or operate machinery.
Always take Matroda® tablets exactly as your doctor has told you. You should check with your doctor or pharmacist if you are not sure.
Recommended dose:
Recommended dose should not exceed 400 mg/day in any of below mentioned conditions.
· High blood pressure: Initially 100 mg Matroda® daily. The dose may be increased to 200mg daily in single or divided doses.
· Angina: 50 to 100 mg Matroda® two or three times daily.
· Irregular heart beats: 50mg Matroda® two or three times daily. The dose may be increased to 300 mg daily in divided doses.
· Heart attack: 50mg Matroda® every six hours. The usual maintenance dose is 200mg daily in divided doses. The medicine should be taken for at least 3 months.
· Prevention of migraine: 100 to 200 mg Matroda® daily in divided doses (in the morning and evening).
· Overactive thyroid gland (thyrotoxicosis): 50mg Matroda® four times daily.
· Children: Not recommended.
· Patients with impaired kidney or liver function: In such cases the dose should be adjusted. Always follow your doctor's advice.
If you take more Matroda ® than you should
If you have accidentally taken more than the prescribed dose, contact your nearest casualty department or tell your doctor or pharmacist at once.
Symptoms of overdose are low blood pressure (fatigue and dizziness), slow pulse, heart conduction problems, shortness of breath, unconsciousness, coma, cardiac arrest, feeling and being sick, blue colouring of the skin, low blood sugar levels and high levels of potassium in the blood.
If you forget to take Matroda ®
If you forget to take a dose, take it as soon as you remember unless it is nearly time for your next dose. Then go on as before. Do not take a double dose to make up for a forgotten dose.
If you stop taking Matroda ®
Do not suddenly stop taking Matroda® tablets as this may cause worsening of heart failure and increase the risk of heart attack. Only change the dose or stop the treatment in consultation with your doctor.
If you have any further questions on the use of this medicine, ask your doctor or pharmacist.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Stop treatment and contact a doctor at once if you have the following symptoms of an:
· allergic reaction such as itching, difficulty breathing or swelling of the face, lips, tongue or throat, or difficulty breathing or swallowing.
Tell your doctor if you notice any of the following side effects or notice any other effects not listed:
Common (may affect up to 1 in 10 people):
· tiredness
· dizziness.
· headache
· a slow heart rate, feeling faint on standing due to low blood pressure
· shortness of breath with or without strenuous physical activity
· feeling or being sick
· stomach pain
Rare (may affect up to 1 in 1,000 people):
· depression
· nightmares
· nervousness
· anxiety
· sexual dysfunction or reduced sex drive
· inability to think clearly
· sleepiness or difficulty in sleeping
· tingling or 'pins and needles’
· difficulty breathing
· heart failure
· irregular heart rate
· palpitation
· water retention causing swelling
· Raynaud's phenomenon (causing pain, numbness, coldness and blueness of the fingers)
· diarrhoea or constipation
· skin rash
· muscle cramps
Very rare (may affect up to 1 in 10,000 people):
· changes in the results of blood tests
· effects on blood clotting causing easy or unexplained bruising
· changes in personality
· confusion
· hallucinations
· visual disturbances
· dry or irritated eyes
· ringing in the ears
· loss of hearing with high doses
· heart conduction problems
· chest pain
· gangrene in patients with severe poor circulation
· runny nose
· dry mouth
· weight gain
· sensitivity to light
· increased sweating
· hair loss
· worsening or new psoriasis
· joint inflammation (arthritis)
· disturbances of sexual desire and performance
· changes in liver function tests
· taste disorders
Not known (frequency cannot be estimated from the available data):
· worsening or development of limping · hepatitis (symptoms include fever, sickness and yellowing of the skin or whites of the eyes)
· Peyronie's syndrome (bending of the penis)
· symptoms of high levels of the thyroid hormone or low blood sugar may be hidden
· increase in blood fats or decrease in cholesterol
· retroperitoneal fibrosis (symptoms include lower back pain, high blood pressure)
· occurrence of antinuclear antibodies not associated with systemic lupus erythematosus (SLE).
− Keep out of the reach and sight of children.
− Do not take Matroda® after the expiry date which is printed on the outside of the pack. The expiry date refers to the last day of that month.
− Store below 30°C.
− Do not use if blister seal is broken or damaged.
− Do not throw away any medicines via wastewater. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.
The active substance: Each film-coated tablet contains 50 mg or 100mg of the active ingredient, Metoprolol Tartrate.
The other ingredients are: Microcrystalline cellulose, povidone, sodium starch glycolate, colloidal anhydrous silica, magnesium stearate, hypromellose, titanium dioxide, talc and macrogol.
Dar Al Dawa Development & Investment Co. Ltd.
Prince Hashem Bin Al-Hussein Street.
Na’ur – Amman – Jordan.
Tel. (+962 6) 22 22 200
Fax. (+962 6) 57 27 776
To report any side effects:
· Jordan
· Jordan Food and Drug Administration − Phone: +962 6 5632000 − Website: www.jfda.jo − reporting link https://primaryreporting.who-umc.org/jo − Email: jpc@jfda.jo |
· Saudi Arabia
· The National Pharmacovigilance Centre (NPC): − SFDA Call Centre: 19999 − E-mail: npc.drug@sfda.gov.sa − Website: https://ade.sfda.gov.sa/ |
· United Arab Emirates
· Pharmacovigilance and Medical Device Section · Drug Department · UAE Ministry of Health & Prevention − Hotline: 80011111 − Email: pv@mohap.gov.ae − P.O. Box: 1853 Dubai UAE |
· Sudan
· National Medicines and Poisons Board (NMPB) − Fax: + 249 183522263 − E-mail: info@nmpb.gov.sd − Website : www.nmpb.gov.sd |
· Other countries
¾ Please contact the relevant competent authority. |
يحتوي ماترودا على طرطرات الميتوبرولول، التي تنتمي إلى مجموعة من الأدوية تسمى حاصرات بيتا.
يستخدم ماترودا لعلاج :
· ارتفاع ضغط الدم.
· الذبحة الصدرية (ألم في الصدر يحدث بسبب انسداد الشرايين المؤدية إلى القلب)
· عدم انتظام ضربات القلب
· الأعراض الناتجة عن فرط نشاط الغدة الدرقية ( التسمم الدرقي).
كما يستخدم ماترودا لمنع:
· تضرر القلب والوفاة الناجمَيْن عن النوبات القلبية.
· الشقيقة.
لا تتناول ماترودا إذا:
· كان لديك حساسية تجاه ميتوبرولول، أو تجاه حاصرات بيتا الأخرى أو أي من المواد الأخرى المكونة للدواء.(انظر القسم 6)
· كنت تعاني من مشكلات توصيل أو نظم القلب.
· كان لديك فشل قلبي شديد أو غير مسيطر عليه.
· كنت تعاني من صدمة نتيجة لمشكلات القلب.
· كنت تعاني من انسداد الأوعية الدموية بما في ذلك مشكلات الدورة الدموية (التي قد تؤدي إلى توخّز أو شحوب أو ازرقاق أصابع القدم واليد).
· كان معدل ضربات القلب بطيئًا أو عانيت من نوبة قلبية معقدة بسبب معدل ضربات القلب البطيء بشكل ملحوظ.
· شعرت بضيق أو ألم في الصدر في أوقات الراحة (ذبحة برينزماتال).
· لديك أو عانيت سابقًا من صعوبة في التنفس أو الربو بما في ذلك مرض الانسداد الرئوي المزمن الذي يسبب السعال، الأزيز أو ضيق التنفس، البلغم، ارتفاع معدل التهابات الصدر.
· كنت تعاني من ورم القواتم غير المعالج (ارتفاع ضغط الدم نتيجة لوجود ورم بالقرب من الكلية).
· كنت تعاني من ارتفاع حامضية الدم (وهي حالة تسمى حماض أيضي).
· كنت تعاني من انخفاض ضغط الدم.
· كنت تعاني من داء السكري المرتبط بنوبات متكررة من انخفاض سكر الدم.
· كنت تعاني من مرض أو فشل في الكبد أو الكلى.
· كنت تتناول أدوية أخرى لعلاج ضغط الدم عن طريق الحقن مثل فيراباميل، ديلتيازيم أو ديسوبيراميد.
المحاذير والاحتياطات
تحدث مع طبيبك أو الصيدلي قبل تناول ماترودا إذا كنت:
· تعاني من تاريخ مرضي من ردود الفعل التحسسية، مثل التحسس بسبب لسعات الحشرات، الأطعمة أو المواد الأخرى.
· تعاني من داء السكري (قد لا يظهر انخفاض مستويات سكر الدم مع تناول هذا الدواء).
· تعاني من فشل القلب المتحكم به.
· تعاني من بطء في معدل ضربات القلب أو اضطراب في الأوعية الدموية.
· تعاني من ورم القواتم المعالج (ارتفاع ضغط الدم نتيجة لوجود ورم بالقرب من الكلية).
· تعاني أو عانيت مسبقًا من الصدفية (طفح جلدي شديد).
· تعاني من تشمع الكبد.
· كبيرًا في السن.
· تعاني من وهن عضلي وبيل.
· تعاني من جفاف في العينين.
التخدير والجراحة
إذا كنت ستخضع لعملية جراحية أو لتناول مخدر، أخبر طبيبك أو طبيب الأسنان الخاص بك أنك تتناول ماترودا، وذلك لأن ضربات القلب قد تتباطأ كثيرًا.
الأطفال
لا تقم بإعطاء هذا الدواء للأطفال.
الأدوية الأخرى وماترودا
لا تتناول أقراص ماترودا إذا كنت تتناول:
· مثبطات الأكسيداز أحادي الأمين لعلاج الاكتئاب.
· الأدوية الأخرى الخافضة للضغط مثل فيراباميل، نيفيديبين وديلتيازيم.
· ديوسبيراميد أو كوينيدين (لعلاج عدم انتظام ضربات القلب).
أخبر طبيبك أو الصيدلي إذا كنت تتناول، تناولت مؤخرًا أو قد تتناول أي أدوية أخرى:
· الأدوية التي تستخدم لعلاج تقرحات المعدة مثل سيميتيدين
· الأدوية التي تستخدم لعلاج ارتفاع ضغط الدم مثل هيدرالازين، كلونيدين أو برازوسين
· الأدوية التي تستخدم لعلاج عدم انتظام ضربات القلب مثل أميودارون وبروبافينون
· الأدوية التي تستخدم لعلاج الاكتئاب مثل مضادات الاكتئاب ثلاثية الحلقات أو مثبطات إعادة امتصاص السيروتونين الانتقائية
· الأدوية التي تستخدم لعلاج داء الصرع مثل الباربيتورات
· الأدوية التي تستخدم لعلاج الاضطرابات العقلية مثل الفينوثيازين
· الأدوية المخدرة مثل سيكلوبروبان أو ترايكلوراثيلين
· الأدوية التي تستخدم لعلاج بعض أنواع السرطانات، وخاصة سرطان الكبد مثل ألديسلوكين
· الأدوية التي تستخدم لعلاج ضعف الانتصاب مثل ألبروستاديل
· مضادات القلق أو المنومات (مثل تيمازيبام، نيترازيبام، ديازيبام)
· إندوميثاسين أو سيليكوكسيب (مضادات الالتهاب اللاستيرويدية)
· ريفامبيسين (مضاد حيوي) أو تيربينافين (مضاد فطريات)
· الإستروجين مثل الحبوب المانعة للحمل أو العلاج بالهرمونات البديلة
· الستيرويدات القشرية (مثل هيدروكورتيزون، بريدنيزولون)
· حاصرات بيتا الأخرى مثل قطرات العين
· أدرينالين (إبينفرين) أو نورأدرينالين (نورإبينفرين)، التي تستخدم خلال الصدمة التأقية أو المحاكيات الودية الأخرى.
· الأدوية التي تستخدم لعلاج داء السكري
· ليدوكايين (مخدر موضعي)
· موكسيسيليت (يستخدم لعلاج متلازمة رينويد)
· الأدوية التي تستخدم لعلاج الملاريا مثل ميفلوكوين
· الأدوية التي تستخدم لمنع الغثيان والتقيؤ مثل تروبيسيترون
· الأدوية التي تستخدم لعلاج الربو مثل زانثينات (أمينوفيلين أو ثيوفيلين)
· الأدوية التي تستخدم لعلاج الشقيقة مثل إرجوتامين
· الأدوية التي تستخدم لعلاج اضطرابات القلب مثل الغلايكوسيدات القلبية مثل ديجوكسين
· الأدوية التي تستخدم لعلاج التهاب المفاصل الروماتويدي مثل هيروكسيكلوروكوين
· ديفينهيدرامين (مضاد هيستامين يسبب النعاس)
ماترودا مع الكحول
يوصى بتجنب تناول الكحول أثناء تناول هذا الدواء
قد يعمل الكحول على زيادة تأثير طرطرات الميتوبرولول على خفض ضغط الدم.
الحمل والرضاعة
لا يوصى بتناول ماترودا أثناء الحمل أو الرضاعة. إذا كنتِ حاملًا أو مرضعة، تعتقدين أنك حامل أو تخططين للإنجاب، اسألي الطبيب أو الصيدلاني للمشورة قبل تناول هذا الدواء.
تأثير ماترودا على القيادة واستخدام الآلات
قد يسبب ماترودا لك التعب أو الدوار.
إذا كان له تأثير عليك، يجب عدم القيادة أو استخدام الآلات.
تناول أقراص ماترودا دائمًا حسب إرشادات الطبيب. يجب عليك التحقق من طبيبك أو الصيدلي إذا لم تكن متأكدًا.
الجرعات الموصى بها:
يجب ألا تتجاوز الجرعة الموصى بها 400 ملغم/يوم في أي من الحالات التالية:
· ارتفاع ضغط الدم: 100 ملغم من ماترودا يوميًا كجرعة ابتدائية. قد يتم رفع الجرعة إلى 200 ملغم يوميًا كجرعة تؤخذ مرة واحدة أو مقسمة على جرعتين.
· الذبحة الصدرية: 50 إلى 100 ملغم من ماترودا مرتان أو ثلاث مرات يوميًا.
· عدم انتظام ضربات القلب: 50 ملغم من ماترودا مرتان أو 3 مرات يوميًا. قد تتم مضاعفة الجرعة إلى 300 ملغم يوميًا على جرعات مقسمة.
· النوبة القلبية: 50 ملغم من ماترودا كل 6 ساعات. الجرعة المداومة المعتادة هي 200 ملغم يوميًا مقسمة على جرعات. يجب تناول الدواء لمدة 3 أشهر على الأقل.
· الوقاية من نوبات الشقيقة: 100 إلى 200 ملغم من ماترودا يوميًا على جرعات مقسمة (جرعة صباحًا وأخرى مساءً).
· فرط نشاط الغدة الدرقية (التسمم الدرقي): 50 ملغم من ماترودا 4 مرات يوميًا.
· الأطفال: لا يعطى للأطفال
· المرضى الذين يعانون من خلل في وظائف الكبد أو الكلى: في مثل هذه الحالات، يجب تعديل الجرعة. اتبع نصيحة الطبيب دومًا.
إذا تناولت ماترودا أكثر مما ينبغي
إذا تناولت ماترودا عن طريق الخطأ أكثر مما ينبغي، اتصل بأقرب مستشفى أو أخبر طبيبك أو الصيدلي فورًا.
تتمثل أعراض زيادة الجرعات بانخفاض ضغط الدم (الإجهاد والدوار)، بطء نبضات القلب، مشكلات التوصيل القلبي، ضيق التنفس، فقدان الوعي، الغيبوبة، توقف القلب المفاجئ، التقيؤ والغثيان، ازرقاق الجلد، انخفاض مستويات السكر في الدم وارتفاع مستويات البوتاسيوم في الدم.
إذا نسيت أن تتناول ماترودا
إذا نسيت أن تتناول الجرعة، تناولها في أقرب وقت ممكن ما لم يحن وقت الجرعة التالية. واستمر كذلك. لا تتناول جرعة مضاعفة لتعويض الجرعة الفائتة.
إذا توقفت عن تناول ماترودا
لا تتوقف عن تناول أقراص ماترودا بشكل مفاجئ لأن ذلك قد يؤدي إلى تفاقم قصور القلب وزيادة خطر حدوث النوبات القلبية. استشر الطبيب قبل تغيير الجرعة أو التوقف عن تناول الدواء.
إذا كان لديك أي أسئلة أخرى حول هذا الدواء، اسأل الطبيب أو الصيدلي.
كما هو الحال في كل الأدوية، هذا الدواء يمكن أن يتسبب بأعراض جانبية، بالرغم من أنها قد لا تحدث للجميع.
توقف عن تناول الدواء وتواصل مع طبيبك فورًا إذا ظهرت لديك الأعراض التالية ل:
· ردود فعل تحسسية مثل الحكة، صعوبة التنفس أو تورم الوحه، الشفتين، اللسان أو الحلق، أو صعوبة التنفس أو البلع.
أخبر طبيبك إذا لاحظت أي من التأثيرات التالية أو لاحظت تأثيرات أخرى غير مذكورة:
شائعة (قد تؤثر على ما يصل إلى 1 من 10 أشخاص):
· تعب
· دوار
· صداع
· بطء ضربات القلب والشعور بالإغماء عند الوقوف نتيجة لانخفاض ضغط الدم
· الشعور بضيق في التنفس مع أو بدون ممارسة الرياضة الشاقّة
· الشعور بالغثيان والتقيؤ
· ألم في المعدة
نادرة (قد تؤثر على ما يصل إلى 1 من 1000 شخص):
· اكتئاب
· كوابيس
· هلع
· قلق
· العجز الجنسي أو فقدان الرغبة الجنسية
· عدم القدرة على التفكير بشكل جيد
· النعاس أو صعوبة في النوم
· الشعور بوخز يشبه الدبابيس والإبر
· صعوبة في التنفس
· فشل القلب
· عدم انتظام ضربات القلب
· خفقان
· احتباس الماء الذي يسبب التورم
· ظاهرة رينود (تسبب الألم، الخدر، برودة وازرقاق أصابع اليدين)
· إسهال أو إمساك
· طفح جلدي
· تقلصات في العضلات
نادرة جدًا (قد تصيب ما يصل إلى 1 من 10000 شخص)
· تغيرات في نتائج اختبارات الدم
· تأثيرات على تخثر الدم تجعل الكدمات سهلة الظهور وغير مبررة
· اضطرابات في الشخصية
· ارتباك
· هلوسات
· اضطرابات الرؤية
· جفاف وتهيج العينين
· طنين في الأذن
· فقدان السمع مع الجرعات المرتفعة من الدواء
· مشاكل في توصيل القلب
· ألم في الصدر
· الغرغرينا لدى مرضى ضعف الدورة الدموية الشديد
· سيلان الأنف
· جفاف الفم
· زيادة الوزن
· الحساسية للضوء
· زيادة التعرق
· فقدان الشعر
· ظهور الصدفية أو تفاقمها إذا كانت موجودة
· التهاب المفاصل
· اضطرابات في الرغبة والأداء الجنسي
· تغيرات في اختبارات وظائف الكبد
· اضطرابات في حاسة التذوق
غير معروفة (لا يمكن التنبؤ بالتكرار حسب البيانات المتاحة)
· تفاقم أو ظهور العرج
· التهاب الكبد (الأعراض حمى، مرض، اصفرار الجلد أو اصفرار الجزء الأبيض من العينين)
· متلازمة بيروني (اعوجاج القضيب)
· احتمالية اختفاء ظهور أعراض ارتفاع مستويات هرمون الغدة الدرقية أو أعراض انخفاض السكر في الدم
· زيادة نسبة الدهون في الدم وانخفاض الكولسترول
· تليف خلف الصفاق (أعراض تشمل ألم أسفل الظهر، ارتفاع ضغط الدم)
· وجود أجسام مضادة للنواة غير مرتبطة بالذئبة الحمامية الجهازية (SLE).
- يحفظ بعيدا عن متناول أيدي الاطفال ونظرهم.
- لا تستخدم ماترودا بعد تاريخ الانتهاء المذكور على العبوة الخارجية. يدل تاريخ الانتهاء على آخر يوم في الشهر المذكور.
- يحفظ على درجة حرارة تقل عن 30 درجة مئوية .
- لا تستخدم في حال وجدت الشريط تالفًا أو مفتوحًا.
- لا تتخلص من الأدوية في المياه العادمة أو النفايات المنزلية. اسأل الصيدلي حول الطريقة السليمة للتخلص من الأدوية التي لم تعد بحاجة إليها. سيساعد هذا في حماية البيئة
المادة الفعالة: يحتوي كل قرص مغلف على50 ملغم أو 100 ملغم من طرطرات الميتوبرولول
المكونات الأخرى هي: سليلوز دقيق البلورية، بوفيدون، أملاح الصوديوم لجليكولات النشا، سيليكا غروية لامائية، ستيارات المغنيسيوم، هيبروميللوز، ثاني أكسيد التيتانيوم، تالك و ماكروغول.
أقراص ماترودا 50 ملغم هي أقراص مغلفة دائرية الشكل لونها أبيض مرمزة بالرمز (C172) على جهة واحدة ولها سطح أملس على الجهة الأخرى.
أقراص ماترودا 100 ملغم هي أقراص مغلفة دائرية الشكل لونها أبيض مرمزة بالرمز (C173) على جهة واحدة ولها سطح أملس على الجهة الأخرى.
أقراص ماترودا المغلفة تتوفر في عبوات سعة العبوة 40 قرص (تحتوي كل عبوة على 4 أشرطة وكل شريط يحتوي على 10 أقراص).
شركة دارالدواء للتنمية والاستثمار المساهمة المحدودة
شارع الأمير هاشم بن الحسين
ناعور- عمان - الأردن
هاتف. 200 22 22 (6 962 +)
فاكس.776 27 57 (6 962 +)
للإبلاغ حول الأعراض الجانبية التي قد تحدث يرجى التواصل عبر العناوين التالية:
· الأردن
· المؤسسة العامة للغذاء والدواء
- الرقم: 962 6 5632000+
- الموقع الإلكتروني: www.jfda.jo
- رابط التبليغ: https://primaryreporting.who-umc.org/jo
− البريد الإلكتروني: jpc@jfda.jo
· المملكة العربية السعودية
o المركز الوطني للتيقظ الدوائي - مركز الاتصال الموحد: 19999 - البريد الإلكتروني: npc.drug@sfda.gov.sa - الموقع الإلكتروني https://ade.sfda.gov.sa/: |
· الإمارات العربية المتحدة
· قسم اليقظة الدوائية والوسائل الطبية · إدارة الدواء · وزارة الصحة ووقاية المجتمع − الخط الساخن : ٨٠٠١١١١١ − إيميل : pv@mohap.gov.ae − صندوق بريد: ١٨٥٣ دبي الإمارات العربية المتحدة |
· السودان
· المجلس القومي للأدوية والسموم - فاكس: 183522263 (249+) - البريد الإلكتروني: info@nmpb.gov.sd - الموقع الإلكتروني: www.nmpb.gov.sd |
· الدول الأخرى
- الرجاء الاتصال بالمؤسسات والهيئات الوطنية في كل دولة |
In the management of:
· Hypertension
· Angina pectoris
· Cardiac arrhythmias (in particular supraventricular tachycardias)
· As an adjunctive treatment of thyrotoxicosis.
· Early intervention of metoprolol in acute myocardial infarction reduces infarct size and the incidence of ventricular fibrillation. Pain relief may also decrease the need for opiate analgesics.
· Long-term prophylaxis after recovery from acute myocardial infarction.
· Prophylaxis of migraine.
Metoprolol has been shown to reduce mortality when administered to patients with acute myocardial infarction.
Metoprolol is indicated in adults
Posology
The following dosage regimes are intended only as a guideline and should always be adjusted to the individual requirements of the patient but should not exceed 400 mg/day.
Adults:
Hypertension
Initially 100 mg daily. This may be increased, if necessary to 200 mg daily in single or divided doses. Combination therapy with a diuretic or vasodilator may also be considered to further reduce blood pressure.
Metoprolol may be administered with benefit both to previously untreated patients with hypertension and to those in whom the response to previous therapy is inadequate. In the latter type of patient the previous therapy may be continued and metoprolol added into the regime with adjustment of the previous therapy if necessary.
Angina pectoris
Usually 50-100 mg two or three times daily. In general a significant improvement in exercise tolerance and reduction of angina attacks may be expected with a dose of 50-100 mg twice daily.
Cardiac arrhythmias
50 mg two or three times daily is usually sufficient. If necessary the dose can be increased up to 300 mg daily in divided doses.
Following the treatment of an acute arrhythmia with Metoprolol Tartrate injection, continuation therapy with metoprolol tablets should be initiated 4-6 hours later. The initial oral dose should not exceed 50mg twice daily.
Myocardial Infarction:
Early intervention: Orally, therapy should commence 15 minutes after the last intravenous injection with 50 mg every 6 hours for 48 hours and preferably within 12 hours of the onset of chest pain. Patients who fail to tolerate the full intravenous dose should be given half the suggested oral dose.
Maintenance: The usual maintenance dose is 200mg daily given in divided doses.
The treatment should be continued for at least 3 months.
Thyrotoxicosis
50mg four times daily. Dose should be reduced progressively as euthyroid state is achieved.
Prophylaxis of migraine
100-200mg daily in divided doses (morning and evening).
Elderly
The optimum dose should be individually determined according to clinical response.
There is no evidence to suggest that dosage requirements are different in otherwise healthy elderly patients. However, caution is indicated in elderly patients as an excessive decrease in blood pressure or pulse rate may cause the blood supply to vital organs to fall to inadequate levels.
Dosage should be reduced in the elderly where there is impairment of hepatic function.
Paediatric population
The safety and efficacy of Metoprolol in children has not been established.
Metoprolol Tartrate is not recommended in children
Hepatic impairment
In patients with significant hepatic dysfunction dosage reduction may be advised.
Renal impairment
Dose adjustment is not warranted in renal impairment.
Method of Administration
For oral administration.
Abrupt cessation of therapy with a beta-blocker should be avoided especially in patients with ischaemic heart disease. When possible, metoprolol should be withdrawn gradually over a period of 10 days, the doses diminishing to 25mg for the last 6 days. If necessary, at the same time, initiating replacement therapy, to prevent exacerbation of angina pectoris. In addition, hypertension and arrhythmias may develop. When it has been decided to interrupt a betablockade in preparation for surgery, therapy should be discontinued for at least 24 hours. Continuation of betablockade reduces the risk of arrhythmias during induction and intubation, however the risk of hypertension may be increased as well. If treatment is continued, caution should be observed with the use of certain anaesthetic drugs. The patient may be protected against vagal reactions by intravenous administration of atropine. During its withdrawal the patient should be kept under close surveillance.
Although cardioselective beta-blockers may have less effect on lung function than non-selective beta-blockers these should be avoided in patients with reversible obstructive airway disease unless there are compelling clinical reasons for their use.
Although metoprolol has proved safe in a large number of asthmatic patients, it is advisable to exercise care in the treatment of patients with chronic obstructive pulmonary disease.
Therapy with a beta2-stimulant may become necessary or current therapy require adjustment. Therefore, non selective beta blockers should not be used for these patients, and beta1-selective blockers only with the utmost care.
Discontinuation of the drug should be considered if any such reaction is not otherwise explicable. Cessation of therapy with a beta blocker should be gradual.
Metoprolol Tartrate tablets may not be administered to patients with untreated congestive heart failure. The congestive heart failure needs to be brought under control first of all. If concomitant digoxin treatment is taking place, it must be borne in mind that both medicinal products slow AV conduction and that there is therefore a risk of AV dissociation. In addition, mild cardiovascular complications may occur, manifesting as dizziness, bradycardia, and a tendency to collapse.
When a beta blocker is being taken, a serious, sometimes even life-threatening deterioration in cardiac function can occur, in particular in patients in whom the action of the heart is dependent on the presence of sympathetic system support. This is due less to an excessive beta-blocking effect and more to the fact that patients with marginal heart function tolerate poorly a reduction in sympathetic nervous system activity, even where this reduction is slight. This causes contractility to become weaker and the heart rate to reduce and slows down AV conduction. The consequence of this can be pulmonary oedema, AV block, and shock. Occasionally, an existing AV conduction disturbance can deteriorate, which can lead to AV block.
In patients with a phaeochromocytoma, an alpha blocker should be given concomitantly.
Before a patient undergoes an operation, the anaesthetist must be informed that metoprolol is being taken. Acute initiation of high-dose metoprolol to patients undergoing non-cardiac surgery should be avoided, since it has been associated with bradycardia, hypotension and stroke including fatal outcome in patients with cardiovascular risk factors.
Beta-blockers mask some of the clinical signs of thyrotoxicosis. Therefore, Metoprolol should be administered with caution to patients having, or suspected of developing, thyrotoxicosis, and both thyroid and cardiac function should be monitored closely
Simultaneous administration of adrenaline (epinephrine), noradrenaline (norepinephrine) and β blockers may lead to increase in blood pressure and bradycardia.
Metoprolol may induce or aggravate bradycardia, symptoms of peripheral arterial circulatory disorders and anaphylactic shock. If the pulse rate decreases to less than 50-55 beats per minute at rest and the patient experiences symptoms related to the bradycardia, the dosage should be reduced.
Metoprolol may be administered when heart failure has been controlled.
Digitalisation and/or diuretic therapy should also be considered for patients with a history of heart failure or patients known to have a poor cardiac reserve.
Metoprolol may reduce the effect of diabetes treatment and mask the symptoms of hypoglycaemia. The risk of a carbohydrate metabolism disorder or masking of the symptoms of hypoglycaemia is lower when using metoprolol prolonged release tablets than when using regular tablet forms for beta1 selective beta blockers and significantly lower than when using nonselective beta blockers. In labile and insulin dependent diabetes, it may be necessary to adjust the hypoglycaemic therapy.
In case of unstable or insulin-dependent diabetes mellitus, it may be necessary to adjust the hypoglycaemic treatment (because of the likelihood of severe hypoglycaemic conditions).
In patients with significant hepatic dysfunction it may be necessary to adjust the dosage because metoprolol undergoes biotransformation in the liver.
Patients with hepatic or renal insufficiency may need a lower dosage, and metoprolol is contraindicated in patients with hepatic or renal disease/failure (see section 4.3). The elderly should be treated with caution, starting with a lower dosage but tolerance is usually good in the elderly. It may be necessary to use a lower strength formulation in elderly patients and patients with hepatic or renal impairment and an alternative product should be prescribed.
Patients with anamnestically known psoriasis should take beta-blockers only after careful consideration as the medicine may cause aggravation of psoriasis.
Beta blockers may increase both the sensitivity towards allergens and the seriousness of anaphylactic reactions. Adrenaline (epinephrine) treatment does not always give the desired therapeutic effect in individuals receiving beta blockers (see also section 4.5).
Beta blockers may unmask myasthenia gravis.
In the presence of liver cirrhosis, the bioavailability of metoprolol may be increased, and dosage should be adjusted accordingly.
Patients with rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose galactose mal-absorption should not take this medicine.
Dry eyes either alone or, occasionally, with skin rashes has occurred. In most cases the symptoms cleared when metoprolol treatment was withdrawn.
Patients should be observed carefully for potential ocular effects. If such effects occur, discontinuation of metoprolol should be considered.
This medicine contains less than 1 mmol sodium (23 mg) per tablets, that is to say essentially 'sodium-free'.
· Anaesthetic drugs may attenuate reflex tachycardia and increase the risk of hypotension. Metoprolol therapy should be reported to the anaesthetist before the administration of a general anaesthetic. If possible, withdrawal of metoprolol should be completed at least 48 hours before anaesthesia. However, for some patients undergoing elective surgery, it may be desirable to employ a betablocker as premedication. By shielding the heart against the effect of stress, metoprolol may prevent excessive sympathetic stimulation which is liable to provoke such cardiac disturbance as arrhythmias or acute coronary insufficiency during induction and intubation. Anaesthetic agents causing myocardial depression, such as cyclopropane and trichlorethylene, are best avoided. In a patient under beta-blockade an anaesthetic with as little negative inotropic activity as possible (halothane/nitrous oxide) should be selected.
· It may be necessary to adjust the dose of the hypoglycaemic agent in labile or insulin-dependent diabetes. Beta-adrenergic blockade may prevent the appearance of signs of hypo-glycaemia (tachycardia).
· Like all beta-blockers, metoprolol should not be given in combination with calcium channel blockers i.e. verapamil and to a lesser extent diltiazem since this may cause bradycardia, hypotension, heart failure and asystole and may increase auriculoventricular conduction time. However, combinations of antihypertensive drugs may often be used with benefit to improve control of hypertension. Calcium blockers of the verapamil type should not be administered intravenously to patients receiving beta blockers (see section 4.3).
· Care should also be taken when beta-blockers are given in combination with sympathetic ganglion blocking agents, other beta blockers or MAO inhibitors. Concomitant administration of tricyclic antidepressants, barbiturates and phenothiazines as well as other antihypertensive agents may increase the blood pressure lowering effect.
· Calcium channel blockers (such as dihydropyridine derivatives e.g. nifedipine) should not be given in combination with metoprolol because of the increased risk of hypotension and heart failure. In patients with latent cardiac insufficiency, treatment with beta-blocking agents may lead to cardiac failure. Beta-blockers used in conjunction with clonidine increase the risk of “rebound hypertension”. If combination treatment with clonidine is to be discontinued, metoprolol should be withdrawn several days before clonidine.
· The effects of metoprolol and other antihypertensive drugs on blood pressure are usually additive, and care should be taken to avoid hypotension.
· NSAIDs (especially indometacin) may reduce the antihypertensive effects of beta-blockers possibly by inhibiting renal prostaglandin synthesis and/or causing sodium and fluid retention.
· Digitalis Glycosides and/or diuretics should be considered for patients with a previous history of heart failure or in patients known to have a poor cardiac reserve. Digitalis glycosides in association with beta-blockers may increase in auriculo-ventricular conduction time.
· The administration of adrenaline (epinephrine) or noradrenaline (norepinephrine) to patients undergoing beta-blockade can result in an increase in blood pressure and bradycardia, although this is less likely to occur with beta1-selective drugs. As beta-blockers may affect the peripheral circulation, care should be exercised when drugs with similar activity e.g. ergotamine are given concurrently. Concurrent use of moxisylyte may result in possible severe postural hypotension.
· The effect of adrenaline (epinephrine) in the treatment of anaphylactic reactions may be weakened in patients receiving beta blockers (see also section 4.4).
· Metoprolol will antagonise the beta1-effects of sympathomimetic agents but should have little influence on the bronchodilator effects of beta2- agonists at normal therapeutic doses.
· Enzyme inducing agents (e.g. rifampicin) may reduce plasma concentrations of metoprolol, whereas enzyme inhibitors (e.g. cimetidine, hydralazine and alcohol), selective serotonin reuptake inhibitors (SSRIs) as paroxetine, fluoxetine and sertraline, diphenhydramine, hydroxychloroquine, celecoxib, terbinafine may increase plasma concentrations of hepatically metabolised beta blockers.
· As with all beta-blockers particular caution is called for when metoprolol is administered together with prazosin for the first time as the coadministration of metoprolol and prazosin may produce a first dose hypotensive effect.
· Class 1 antiarrhythmic drugs, e.g. disopyramide, quinidine and amiodarone may have potentiating effects on atrialconduction time and induce negative inotropic effect. Concurrent use of propafenone may result in significant increases in plasma concentrations and half-life of metoprolol. Plasma propafenone concentrations are unaffected. Dosage reduction of metoprolol may be necessary.
· During concomitant ingestion of alcohol and metoprolol the concentration of blood alcohol may reach higher levels and may decrease more slowly. The concomitant ingestion of alcohol may enhance hypotensive effects.
· Metoprolol may impair the elimination of lidocaine.
· Prostaglandin synthetase inhibiting drugs may decrease the hypotensive effects of beta-blockers.
· Concurrent use of oestrogens may decrease the antihypertensive effect of betablockers because oestrogeninduced fluid retention may lead to increased blood pressure.
· Concurrent use of xanthines, especially aminophylline or theophylline, may result in mutual inhibition of therapeutic effects.
· Xanthine clearance may also be decreased especially in patients with increased theophylline clearance induced by smoking.
· Concurrent use requires careful monitoring.
· Concurrent use of aldesleukin may result in an enhanced hypotensive effect.
· Concurrent use of alprostadil may result in an enhanced hypotensive effect.
· There is an increased risk of bradycardia following concomitant use of mefloquine with metoprolol.
· Concomitant use with anxiolytics and hypnotics may result in an enhanced hypotensive effect.
· Concomitant use with corticosteroids may result in antagonism of the hypotensive effect.
· The manufacturer of tropisetron advises caution in concomitant administration due to the risk of ventricular arrhythmias.
Pregnancy:
It is recommended that metoprolol should not be administered during pregnancy or lactation unless it is considered that the benefit outweighs the possible risk to the foetus/infant. Should therapy with metoprolol be employed, special attention should be paid to the foetus, neonate and breast fed infant for any undesirable effects such as slowing of the heart rate.
Metoprolol has, however, been used in pregnancy associated hypertension under close supervision after 20 weeks gestation. Although the drug crosses the placental barrier and is present in cord blood no evidence of foetal abnormalities has been reported. However, there is an increased risk of cardiac and pulmonary complications in the neonate in the postnatal period.
Beta blockers reduce placental perfusion and may cause foetal death and premature birth. Intrauterine growth retardation has been observed after long time treatment of pregnant women with mild to moderate hypertension. Beta blockers have been reported to cause bradycardia in the foetus and the newborn child, there are also reports of hypoglycaemia and hypotension in newborn children.
Animal experiments have shown neither teratogenic potential nor other adverse events on the embryo and/or foetus relevant to the safety assessment of the product. Treatment with metoprolol should be discontinued 48-72 hours before the calculated birth date. If this is not possible, the newborn child should be monitored for 24-48 hours post partum for signs and symptoms of beta blockade (e.g. cardiac and pulmonary complications).
Lactation:
The concentration of metoprolol in breast milk is approximately three times higher than the one in the mother's plasma. The risk of adverse effects in the breastfeeding baby would appear to be low after administration of therapeutic doses of the medicinal product (except in individuals with poor metabolic capacity). Cases of neonatal hypoglycaemia and bradycardia have been described with beta-blockers with low plasma protein binding.
Metoprolol is excreted in human milk. Even though the metoprolol concentration in milk is very low, breast-feeding should be discontinued during treatment with metoprolol. In case of treatment during breast feeding, infants should be monitored carefully for symptoms of beta blockade.
As with all beta-blockers, metoprolol can affect patients' ability to drive and operate machinery. It should be taken into account that occasionally dizziness and fatigue may occur. Patients should be warned accordingly. If affected, patients should not drive or operate machinery
Frequency estimates:
Very common (≥ 1/10); common (≥ 1/100 to < 1/10); uncommon ≥ 1/ 1,000 to < 1/100); rare (≥ 1/10,000 to < 1/1,000); very rare (< 1/10,000), not known (cannot be estimated from available data)
System Organ Class | Very common (≥1/10) | Common (≥1/100 to < 1/10) | Uncommon (≥1/1000 to <1/100) | Rare (≥1/10000 to <1/1000) | Very rare (<1/10000) | Not known (cannot be estimated from the available data) |
Blood and lymphatic system disorders |
|
|
|
| Thrombocytope nia, agranulocytosis |
|
Psychiatric disorders |
|
|
| Depression, nightmares, Nervousness, anxiety, impotence | Hallucinations, Personality disorder, Amnesia/memory impairment |
|
Nervous system disorders |
| Dizziness, headache |
| Alertness decrease, somnolence or insomnia. paraesthesia. |
|
|
Eye disorders |
|
|
|
| Visual disturbances (e.g. blurred vision), dry eye and/ or eye irritation |
|
Ear and labyrinth disorders |
|
|
|
| Tinnitus, and in doses exceeding those recommended “hearing disorders (e.g. hypoacusis or deafness) |
|
Cardiac disorders |
| Bradycardia |
| Heart failure, cardiac arrhythmia, palpitations. | Cardiac conduction disorder, precordial pain. | Increase in existing Intermittent claudication |
Vascular disorders |
| Orthostatic hypotension, occasionally with syncope. |
| Oedema, Raynaud's syndrome. | Gangrene in patients with pre-existing severe peripheral circulatorydisor ders |
|
Respiratory, thoracic and mediastinal disorders |
| Exertional dyspnoea |
| Bronchospas ms (which may occur in patients without a history of obstructive lung disease) | Rhinitis |
|
Gastrointestinal disorders |
| Nausea and vomiting. abdominal pain |
| Diarrhoea or constipation | Dry mouth | Retroperitoneal fibrosis * |
Hepatobiliary disorders |
|
|
|
|
| Hepatitis |
Skin and subcutaneous tissue disorders |
|
|
| Skin rash (in the form of urticaria, psoriasiform and dystrophic skin lesions), | Photosensitivity, hyperhidrosis,alopecia, worsening of psoriasis | Occurrence of antinuclear antibodies (not associated with SLE) |
Musculoskeletal and connective tissue disorders |
|
|
| Muscle cramps | Arthritis |
|
Reproductive system and breast disorders |
|
|
|
| Disturbances of libido and potency | Peyronie's disease * |
General disorders and administration site conditions |
| Fatigue |
|
| Dysgeusia (Taste disturbances) |
|
Investigations |
|
|
|
| Weight increase, liver function test abnormal |
|
* (relationship to Metoprolol has not been definitely established).
Beta-blockers may mask the symptoms of thyrotoxicosis or hypoglycaemia.
Post Marketing Experience
The following adverse reactions have been reported during post-approval
use of metoprolol: confusional state, an increase in blood triglycerides and a decrease in high density lipoprotein (HDL). Because these reports are from a population of uncertain size and are subject to confounding factors, it is not possible to reliably estimate their frequency.
To report any side effects:
Saudi Arabia
· The National Pharmacovigilance Centre (NPC):
· SFDA Call Centre: 19999
· E-mail: npc.drug@sfda.gov.sa
· Website: https://ade.sfda.gov.sa/
Poisoning due to an overdose of metoprolol may lead to severe hypotension, sinus bradycardia, atrioventricular block, heart failure, cardiogenic shock, cardiac arrest, bronchospasm, impairment of consciousness, coma, nausea, vomiting, cyanosis, hypoglycaemia and, occasionally, hyperkalaemia. The first manifestations usually appear 20 minutes to two hours after drug ingestion.
After ingestion of an overdose or in case of hypersensitivity, the patient should be kept under close supervision and be treated in an intensive- care ward. Absorption of any drug material still present in the gastrointestinal tract can be prevented by induction of vomiting, gastric lavage, administration of activated charcoal and a laxative. Artificial respiration may be required.
Bradycardia or extensive vagal reactions should be treated by administering atropine or methylatropine. Hypotension and shock should be treated with plasma/plasma substitutes and, if necessary, catecholamines. The betablocking effect can be counteracted by slow intravenous administration of isoprenaline hydrochloride, starting with a dose of approximately 5 micrograms/minute, or dobutamine, starting with a dose of 2.5micrograms/minute, until required effect has been obtained. In refractory cases isoprenaline can be combined with dopamine. If this does not produce the desired effect either, intravenous administration of 8-10mg glucagon may be considered. If required the injection should be repeated within one hour, to be followed – if required – by an intravenous infusion of glucagon at an administration rate of 1- 3mg/hour.
Administration of calcium ions, or the use of a cardiac pacemaker may also be considered. In patients intoxicated with hydrophilic beta-blocking agents haemodialysis or haemoperfusion may be considered.
Pharmacotherapeutic category: Beta blocking agents, selective, ATC code: C07AB02
Mechanism of action
Metoprolol is a cardioselective beta-adrenergic blocking agent. It has a relatively greater blocking effect on beta1 receptors (i.e. those mediating adrenergic stimulation of heart rate and contractility and release of the fatty acids from fat stores) than on beta2 receptors which are chiefly involved in broncho and vasodilation.
Absorption
Metoprolol is readily and completely absorbed from the gastrointestinal tract. Metoprolol is absorbed fully after oral administration. Within the therapeutic dosage range, the plasma concentrations increase in a linear manner in relation to dosage. Peak plasma levels are achieved after approx. 1.5–2 hours. Even though the plasma profile displays a broader interindividual variability, this appears to be easily reproducible on an individual basis. Due to the extensive first-pass effect, bioavailability after a single oral dose is approx. 50%. After repeated administration, the systemic availability of the dose increases to approx. 70%. After oral intake with food, the systemic availability of an oral dose increases by [SIC] approx. 30–40%.
Distribution
Peak plasma concentrations occur about 1½ hours after a single oral dose. Peak plasma metoprolol concentrations at steady state with usual doses have been reported as 20-340ng/ ml. Metoprolol is widely distributed, it crosses the blood-brain barrier, the placenta. It is slightly bound to plasma protein. The medicinal product is approx. 5–10% bound to plasma proteins.
Biotransformation
Metoprolol is metabolised through oxidation in the liver mainly by the CYP2D6 isoenzyme. Even though three main metabolites have been identified, none of them has a clinically significant beta-blocking effect.
Generally, 95% of an oral dose is found in the urine. Only 5% of the dose is excreted unmodified via the kidneys; in isolated cases, this figure can reach as high as 30%. The elimination half-life of metoprolol averages 3.5 hours (with extremes of 1 and 9 hours). Total clearance is approx. 1 litre/minute. It is extensively metabolised in the liver; O-dealkylation followed by oxidation and aliphatic hydroxylation. The rate of hydroxylation to alpha-hydroxymetoprolol is reported to be determined by genetic polymorphism; the half-life of metoprolol in fast hydroxylators is stated to be 3-4 hours, whereas in poor hydroxylators it is about 7 hours.
Elimination
The metabolites are excreted in the urine together with only small amounts of unchanged metoprolol. Metoprolol is excreted in breast milk.
Special population
Elderly:
In comparison with administration to younger patients, the pharmacokinetics of metoprolol when administered to older patients shows no significant differences.
Renal impairment:
Renal dysfunction has barely any effect on the bioavailability of metoprolol. However, the excretion of metabolites is reduced. In patients with a glomerular filtration rate of less than 5 ml/minute, a significant accumulation of metabolites has been observed. This accumulation of metabolites, however, produces no increase in the beta blockade.
Hepatic impairment:
The pharmacokinetics of metoprolol are influenced only minimally by reduced hepatic function. However, in patients with serious hepatic cirrhosis and a portacaval shunt, the bioavailability of metoprolol can increase, and the total clearance can be reduced. Patients with portacaval anastomosis had a total clearance of approx. 0.3 litres/minute and AUC values that were 6 times higher than those found in healthy persons.
Severe angina pectoris
Intrinsic sympathomimetic activity (ISA) may be a disadvantage for the patient with severe angina pectoris. There are however no indications that the efficacy in hypertensives is influenced by this characteristic. In exceptional cases, however, very high dosages can cause the ISA to predominate over the beta-adrenergic blocking capacity so that restriction of the maximum dosage is indicated.
Respiratory impairment
It has not been proven that beta-blockers with ISA give a lower risk for bronchospasm or enhancement of pre-existing bronchospastic complaints.
There are no preclinical data of relevance to the prescriber which are additional to that already included in other sections of the SPC.
Microcrystalline cellulose, povidone, sodium starch glycolate, colloidal anhydrous silica, magnesium stearate, hypromellose, titanium dioxide, talc and macrogol.
Not applicable
Store below 30ºC.
Primary package | Secondary package |
PVC/PVDC/Aluminum foil | Carton Leaflet |
Matroda 100 mg film coated tablets are available in packs of 40 tablets, each pack contains 4 blisters each containing 10 tablets.
No special requirements.
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