4.1 Therapeutic Indications
Prophylaxis of Plasmodium falciparum malaria in adults and children weighing 11-40 kg.
Treatment of acute, uncomplicated Plasmodium falciparum malaria in adults and in children weighing ≥ 5 kg and <11kg.
Official guidelines and local information on the prevalence of resistance to antimalarial drugs should be taken into consideration. Official guidelines will normally include WHO and public health authorities' guidelines

Posology
The dosage for the prophylaxis and treatment of acute, uncomplicated P. falciparum malaria in children is based on body weight.
Prophylaxis
Dosage in individuals weighing 11-40 kg

Dosage/day

Body Weight Range((kg)
Atovaquone
(mg)
Proguanil (mg)
No of Tablets
11-20
62.5
25
One Atovaquone and proguanil
21-30
125
50
Two Atovaquone and proguanil
31-40
187.5
75
Three Atovaquone and proguanil
>40
250
100
Subjects of >40 kg should receive ONE Atovaquone and proguanil hydrochloride 250/100 mg tablet daily

The safety and effectiveness of Atovaquone and proguanil hydrochloride paediatric tablets for prophylaxis of malaria in children who weigh less than 11 kg has not been established.
Prophylaxis should
• commence 24 or 48 hours prior to entering a malaria-endemic area,
• continue during the period of the stay,
• continue for 7 days after leaving the area.
The safety and effectiveness of Atovaquone and proguanil hydrochloride has been established in studies of up to 12 weeks in residents (semi-immune subjects) of endemic areas (see section 5.1).
In non-immune subjects, the average duration of exposure in clinical studies was 27 days.
Treatment
Dosage in individuals weighing 5-<11 kg

Dosage/day
Body Weight Range (kg)
Atovaquone (mg)
Proguanil (mg)
No of Tablets
5-8
125
50
Two Atovaquone paediatric tablets daily for 3 consecutive days
9-10
187.5
75
Three Atovaquone paediatric tablets daily for 3 consecutive days.
≥ 11
Refer to Atovaquone 250/100 mg Tablets SmPC

The safety and effectiveness of Atovaquone and proguanil hydrochloride paediatric tablets for the treatment of malaria in children who weigh less than 5 kg has not been established.
For individuals who weigh 11 kg or more, the first choice for the treatment of acute, uncomplicated P. falciparum malaria is Atovaquone and proguanil hydrochloride tablets (250/100 mg). Please consult the Atovaquone and proguanil hydrochloride tablets SmPC for the recommended dosage for this weight range. Atovaquone and proguanil hydrochloride tablets are four-times the strength of Atovaquone and proguanil hydrochloride paediatric tablets.
In circumstances when sufficient atovaquone and proguanil hydrochloride tablets are not available, then Atovaquone and proguanil hydrochloride paediatric tablets may be used.
Hepatic Impairment
There are no studies in children with hepatic impairment. However, a pharmacokinetic study in adults indicates that no dosage adjustments are needed in patients with mild to moderate hepatic impairment. Although no studies have been conducted in patients with severe hepatic impairment, no special precautions or dosage adjustment are anticipated (see section 5.2).
Renal Impairment
There are no studies in children with renal hepatic impairment. However, a pharmacokinetic study in adults indicate that no dosage adjustments are needed in those with mild to moderate renal impairment. Due to the lack of information regarding appropriate dosing, atovaquone and proguanil hydrochloride is contraindicated for the prophylaxis of malaria in adults and children with severe

renal impairment (creatinine clearance <30 mL/min; see sections 4.3 and 5.2).
Method of administration
The daily dose should be taken once daily with food or a milky drink (to ensure maximum absorption) at the same time each day.
If patients are unable to tolerate food Atovaquone/Proguanil Hydrochloride paediatric tablets should be administered, but systemic exposure of atovaquone will be reduced. In the event of vomiting within 1-hour of dosing a repeat dose should be taken.
Atovaquone/Proguanil Hydrochloride paediatric tablets should preferably be swallowed whole. If difficulties are encountered when dosing young children, the tablets may be crushed and mixed with food or a milky drink just prior to administration.

Persons taking atovaquone and proguanil hydrochloride for prophylaxis or treatment of malaria should take a repeat dose if they vomit within 1 hour of dosing. In the event of diarrhoea, normal dosing should be continued. Absorption of atovaquone and proguanil hydrochloride may be reduced in individual with diarrhoea or vomiting, but diarrhoea or vomiting was not associated with reduced efficacy in clinical trials of Atovaquone and proguanil hydrochloride for malaria prophylaxis. However, as with other antimalarial agents, subjects with diarrhoea or vomiting should be advised to continue with malaria prevention measures by complying with personal protection measures (repellents, bednets).
In patients with acute malaria who present with diarrhoea or vomiting, alternative therapy should be considered. If Atovaquone and proguanil hydrochloride is used to treat malaria in these patients,

parasitaemia and the patient's clinical condition should be closely monitored.
Atovaquone and proguanil hydrochloride has not been evaluated for the treatment of cerebral malaria or other severe manifestations of complicated malaria including hyperparasitaemia, pulmonary oedema or renal failure. Occasionally, severe allergic reactions (including anaphylaxis) have been reported in patients taking Atovaquone and proguanil hydrochloride. If patients experience an allergic reaction (see section 4.8) Atovaquone and proguanil hydrochloride should be discontinued promptly and appropriate treatment initiated.
Atovaquone and proguanil hydrochloride has been shown to have no efficacy against hypnozoites of Plasmodium vivax as parasite relapse occurred commonly when P. vivax malaria was treated with Atovaquone and proguanil hydrochloride alone. Travellers with intense exposure to P. vivax or P. ovale, and those who develop malaria caused by either of these parasites, will require additional treatment with a drug that is active against hypnozoites.
In the event of recrudescent infections due to P. falciparum after treatment with Atovaquone and proguanil hydrochloride, or failure of chemoprophylaxis with Atovaquone and proguanil hydrochloride, patients should be treated with a different blood schizonticide as such events can reflect a resistance of the parasite.

Parasitaemia should be closely monitored in patients receiving concurrent tetracycline (see section 4.5). The concomitant administration of atovaquone and proguanil hydrochloride and efavirenz or boosted protease-inhibitors should be avoided whenever possible (see section 4.5).
The concomitant administration of Atovaquone and proguanil hydrochloride and rifampicin or rifabutin is not recommended (see section 4.5).
Concurrent use of metoclopramide is not recommended. Another antiemetic treatment should be given (see section 4.5).
Caution is advised when initiating or withdrawing malaria prophylaxis or treatment with Atovaquone and proguanil hydrochloride in patients on continuous treatment with warfarin and other coumarin based anticoagulants (see section 4.5).
Atovaquone and proguanil hydrochloride can increase the levels of etoposide and its metabolite (see section 4.5).
In patients with severe renal impairment (creatinine clearance <30 mL/min) alternatives to Atovaquone and proguanil hydrochloride for treatment of acute P. falciparum malaria should be recommended whenever possible (see sections 4.2, 4.3 and 5.2).
The safety and effectiveness of atovaquone and proguanil hydrochloride tablets for the prophylaxis of malaria in children who weigh less than 11kg and the treatment of malaria in children who weigh less than 5 kg have not been established.
Atovaquone and proguanil hydrochloride paediatric tablets are not indicated for the treatment of acute uncomplicated P. falciparum malaria in individuals weighing 11-40 kg. Atovaquone and proguanil hydrochloride tablets should be used in these individuals (see section 4.2).
This medicine contains less than 1 mmol sodium (23 mg) per tablet, that is to say essentially ‘sodium free’

Concomitant administration of rifampicin or rifabutin is not recommended as it is known to reduce plasma concentrations of atovaquone and proguanil hydrochloride levels by approximately 50% and 34%, respectively (see section 4.4).
Concomitant treatment with metoclopramide has been associated with a significant decrease (about 50%) in plasma concentrations of atovaquone and proguanil hydrochloride. Another antiemetic treatment should be given.
Although some children have received concomitant atovaquone and proguanil hydrochloride and metoclopramide in clinical trials without any evidence of decreased protection against malaria, the possibility of a clinically significant drug interaction cannot be ruled out.
When given with efavirenz or boosted protease-inhibitors, atovaquone and proguanil hydrochloride concentrations have been observed to decrease as much as 75%. This combination should be avoided

whenever possible (see section 4.4).
Proguanil may potentiate the anticoagulant effect of warfarin and other coumarin based anticoagulants which may lead to an increase in the risk of haemorrhage. The mechanism of this potential drug interaction has not been established. Caution is advised when initiating or withdrawing malaria prophylaxis or treatment with atovaquone- proguanil in patients on continuous treatment with oral anticoagulants. The dose of the oral anticoagulant may need to be adjusted during atovaquone-proguanil treatment or after its withdrawal, based on INR results.
Concomitant treatment with tetracycline has been associated with decreases in plasma concentrations of atovaquone and proguanil hydrochloride.
The co-administration of atovaquone and proguanil hydrochloride at doses of 45mg/kg/day in children (n=9) with acute lymphoblastic leukaemia for prophylaxis of PCP was found to increase the plasma concentrations (AUC) of etoposide and its metabolite etoposide catechol by a median of 8.6% (P=0.055) and 28.4% (P=0.031) (respectively compared to the co-administration of etoposide and sulfamethoxazole-trimethoprim). Caution should be advised in patients receiving concomitant therapy with etoposide (see section 4.4).
Proguanil is primarily metabolised by CYP2C19. However, potential pharmacokinetic interactions with other substrates, inhibitors (e.g., moclobemide, fluvoxamine) or inducers (e.g. artemisinin, carbamazepine) of CYP2C19 are unknown (see section 5.2).

Pregnancy The safety of atovaquone and proguanil hydrochloride when administered concurrently for use in human pregnancy has not been established and the potential risk is unknown.
Animal studies showed no evidence for teratogenicity of the combination.
The individual components have shown no effects on parturition or pre- and post-natal development. Maternal toxicity was seen in pregnant rabbits during a teratogenicity study (see section 5.3). The use of Atovaquone and proguanil hydrochloride in pregnancy should only be considered if the expected benefit to the mother outweighs any potential risk to the foetus.
The Proguanil acts by inhibiting parasitic dihydrofolate reductase. There are no clinical data indicating that folate supplementation diminishes drug efficacy. For women of childbearing age receiving folate supplements to prevent neural tube birth defects, such supplements should be continued while taking fixed dose combination of atovaquone and proguanil tablets.
Breast-feeding The atovaquone and proguanil hydrochloride concentrations in milk, in a rat study, were 30% of the concurrent atovaquone and proguanil hydrochloride concentrations in maternal plasma. It is not known whether atovaquone and proguanil hydrochloride is excreted in human milk. Proguanil is excreted in human milk in small quantities.
Atovaquone and proguanil hydrochloride paediatric tablets should not be taken by breast-feeding women.

Dizziness has been reported. Patients should be warned that if affected they should not drive, operate machinery or take part in activities where this may put themselves or others at risk.

In clinical trials of atovaquone and proguanil hydrochloride paediatric tablets for prophylaxis of malaria, 357 children or adolescents 11 to ≤40 kg body weight received atovaquone and proguanil hydrochloride paediatric tablets. Most of these were residents of endemic areas and took atovaquone and proguanil hydrochloride paediatric tablets for about 12 weeks. The rest were travelling to endemic areas, and most took atovaquone and proguanil hydrochloride paediatric tablets for 2-4 weeks.
Open label clinical studies investigating the treatment of children weighing between ≥5 kg and <11 kg have indicated that the safety profile is similar to that in children weighing between 11 kg and 40 kg, and adults.
There are limited long term safety data in children. In particular, the long-term effects of atovaquone and proguanil hydrochloride on growth, puberty and general development have not been studied.In clinical trials of atovaquone and proguanil hydrochloride in the treatment of malaria the most commonly reported adverse reactions were abdominal pain, headache, anorexia, nausea, vomiting, diarrhoea and coughing.
In clinical trials of atovaquone and proguanil hydrochloride for prophylaxis of malaria, the most commonly reported adverse reactions were headache, abdominal pain and diarrhoea.
The following table provides a summary of adverse reactions that have been reported to have a suspected (at least possible) causal relationship to treatment with atovaquone and proguanil hydrochloride -proguanil in clinical trials and spontaneous post-marketing reports. The following convention is used for the classification of frequency: 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); not known (cannot be estimated from the available data).

System Organ Class
Very Common
Common
Uncommon
Rare
Not known2
Blood and lymphatic disorders
Anaemia Neutropenia1
Pancytopenia
Immune system disorders
Allergic reactions
Angioedema3
Anaphylaxis
(see section 4.4) Vasculitis3
Metabolism and nutrition disorders
Hyponatraemia1
Anorexia
Elevated amylase levels1
Psychiatric disorders
Abnormal dreams Depression
Anxiety
Hallucinations
Panic attack Crying Nightmares Psychotic disorder
Nervous system disorders
Headache
Insomnia Dizziness
Seizure
Cardiac disorders
Palpitations
Tachycardia

Gastrointestinal disorders
Nausea1
Vomiting Diarrhoea Abdominal pain
Stomatitis
Gastric intolerance3
Oral ulceration3
Hepatobiliary disorders
Elevated liver enzymes1
Hepatitis Cholestasis 3
Skin and subcutaneous tissue disorders
Pruritus Rash
Hair loss Urticaria
Stevens-Johnson syndrome Erythema multiforme Blister Skin exfoliation Photosensitivity reactions
General disorders and administration site conditions
Fever
Respiratory, thoracic and mediastinal
Cough

1. Frequency taken from atovaquone and proguanil hydrochloride label. Patients participating in clinical trials with atovaquone and proguanil hydrochloride have received higher doses and have often had complications of advance Human Immunodeficiency Virus (HIV) disease. These events may have been seen at a lower frequency or not at all in clinical trials with atovaquone and proguanil hydrochloride.
2. Observed from post-marketing spontaneous reports and the frequency is therefore unknown
3. Observed with proguanil.

Reporting of suspected adverse reactions
Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions at Website:https: //ade.sfda.gov.sa/
To report any side effect(s):

Saudi Arabua:

The National Pharmacovigilance and Drug Safety Centre (NPC)
− Fax: +966-11-2038222
− Call NPC at +966-11-2038222, Ext 2317-2356-2340
− SFDA Call Center: 19999
− E-mail: npc.drug@sfda.gov.sa
− Website: https: //ade.sfda.gov.sa/

Other GCC States:
- Please contact the relevant competent authority.

There is insufficient experience to predict the consequences or suggest specific management of atovaquone and proguanil hydrochloride overdose. However, in the reported cases of atovaquone and proguanil hydrochloride overdose, the observed effects were consistent with known undesirable effects of the drug. If overdose occurs, the patient should be monitored and standard supportive treatment applied.

Pharmacotherapeutic Group: Antimalarials,
ATC Code: P01B B51
Mode of Action
The constituents of combination tablet of atovaquone and proguanil hydrochloride paediatric tablets, atovaquone and proguanil hydrochloride, interfere with two different pathways involved in the biosynthesis of pyrimidines required for nucleic acid replication. The mechanism of action of atovaquone and proguanil hydrochloride against P. falciparum is via inhibition of mitochondrial electron transport, at the level of the cytochrome bc1 complex, and collapse of mitochondrial membrane potential. One mechanism of action of atovaquone and proguanil hydrochloride, via its metabolite cycloguanil, is inhibition of dihydrofolate reductase, which disrupts deoxythymidylate synthesis. Proguanil also has antimalarial activity independent of its metabolism to cycloguanil, and Proguanil, but not cycloguanil, is able to potentiate the ability of Atovaquone and proguanil hydrochloride to collapse mitochondrial membrane potential in malaria parasites. This latter mechanism may contribute to the antimalarial synergy seen when atovaquone and proguanil hydrochloride and proguanil are used in combination.
Microbiology Atovaquone and proguanil hydrochloride has potent activity against Plasmodium spp (in vitro IC50 against P. falciparum 0.23-1.43 ng/mL).
Cross-resistance between atovaquone and proguanil hydrochloride and antimalarial agents of other drug classes was not detected among more than 30 P. falciparum isolates, isolates that demonstrated resistance in vitro to one or more of chloroquine (41% of isolates), quinine (32% of isolates), mefloquine (29% of isolates), and halofantrine (48% of isolates).
The IC50 of the primary metabolite of proguanil-cycloguanil against various P. falciparum strains was 4-20 ng/mL; some activity of proguanil and another metabolite, 4-chlorophenylbiguanide, is seen in vitro at 600-3000 ng/mL).
The combination of atovaquone and proguanil hydrochloride was shown to be synergistic against P. falciparum in vitro. The combination was more effective than either drug alone in clinical studies of the treatment of malaria in both immune and non-immune patients.
Clinical Efficacy
Prophylaxis
The efficacy in non-immune paediatric travellers has not been directly established, but may be assumed through extrapolation by the results on safety and efficacy in studies of up to 12 weeks in paediatric residents (semi-immune) of endemic areas, and from results of safety and efficacy in both semi immune and non immune adults.
Data in the paediatric population are available from two trials that primarily evaluated the safety of atovaquone and proguanil hydrochloride paediatric tablets in (non-immune) travellers to endemic areas. In these trials, a total of 93 travellers weighing <40 kg was given atovaquone and proguanil hydrochloride and 93 received another prophylactic antimalarial regimen (81 chloroquine/ proguanil and 12 mefloquine). The majority of travellers went to Africa and the mean duration of stay was between 2-3 weeks. There were no cases of malaria recorded in any subjects who took part in these studies.
Treatment
An open-label, randomised, parallel-group trial was undertaken in Gabon in 200 children weighing ≥5 kg and <11 kg with confirmed, uncomplicated P. falciparum malaria. Treatment was with atovaquone and proguanil hydrochloride paediatric tablets or amodiaquine suspension.
In the intent-to-treat population, the 28-day cure rate was 87% in the atovaquone and proguanil hydrochloride group (87/100 subjects). In the per-protocol population, the 28-day cure rate was 95% in the atovaquone and proguanil hydrochloride group (87/92 subjects). The parasitological cure rates for the atovaquone and proguanil hydrochloride group were 88% and 95% for the ITT and PP populations, respectively.

There are no pharmacokinetic interactions between atovaquone and proguanil hydrochloride and proguanil at the recommended doses.
In prophylaxis clinical trials where children have received atovaquone and proguanil hydrochloride dosed by bodyweight, trough levels of atovaquone and proguanil hydrochloride, proguanil and cycloguanil in children are generally within the range observed in adults (see following table).
Trough Plasma Concentrations [Mean ± SD, (range)] of Atovaquone and proguanil hydrochloride, Proguanil and Cycloguanil during Prophylaxis with atovaquone and proguanil hydrochloride in Children* and Adults
Atovaquone and proguanil hydrochloride: Proguanil HCL Daily Dose
[Weight Category]
62.5 mg:25 mg
[11-20 kg]
125 mg:50 mg
[21-30 kg]
187.5 mg:75 mg
[31-40 kg]
250mg:100 mg
Adult (> 40 kg)
Atovaquone and
2.2 + 1.1
3.2 + 1.8
4.1 + 1.8
2.1 + 1.2
(0.2-5.8)
(0.2-10.9)
(0.7-8.8)
(0.1-5.7)
No. Subjects
n=87
n=88
n=76
n=100
Proguanil (μg/mL)
12.3 + 14.4
18.8 + 11.2
26.8 + 17.1
26.8 + 14.0
(<5.0-14.3)
(<5.0-87.0)
(5.1-55.9)
(5.2-73.2)
No. Subjects
n=72
n=83
n=75
n=95
Cycloguanil (ng/mL)
7.7 + 7.2
8.1 + 6.3
8.7 + 7.3
10.9 + 5.6
(<5.0-43.5)
(<5.0-44.1)
(6.4-17.0)
(5.0-37.8)
No. Subjects
n=58
n=69
n=66
n=95
* Pooled data from two studies
Absorption
Atovaquone and proguanil hydrochloride is a highly lipophilic compound with low aqueous solubility. Although there are no atovaquone and proguanil hydrochloride bioavailability data in healthy subjects, in HIV-infected patients the absolute bioavailability of a 750 mg single dose of atovaquone and proguanil hydrochloride tablets taken with food is 21% (90% CI: 17% - 27%).
Dietary fat taken with atovaquone and proguanil hydrochloride increases the rate and extent of absorption, increasing AUC 2-3 times and Cmax 5 times over fasting. Patients are recommended to take atovaquone and proguanil hydrochloride paediatric tablets with food or a milky drink (see section 4.2).
Proguanil hydrochloride is rapidly and extensively absorbed regardless of food intake.
Distribution
Apparent volume of distribution of atovaquone and proguanil hydrochloride and proguanil is a function of bodyweight. Atovaquone and proguanil hydrochloride is highly protein bound (>99%) but does not displace other highly protein bound drugs in vitro, indicating significant drug interactions arising from displacement are unlikely.
Following oral administration, the volume of distribution of atovaquone and proguanil hydrochloride and proguanil is approximately 8.8 L/kg.
Proguanil is 75% protein bound. Following oral administration, the volume of distribution of proguanil in adults and children (>5 kg) ranged from 20 to 79 L/kg.
In human plasma the binding of atovaquone and proguanil hydrochloride and proguanil was unaffected by the presence of the other.
Biotransformation
There is no evidence that atovaquone and proguanil hydrochloride is metabolised, and there is negligible excretion of atovaquone and proguanil hydrochloride in urine with the parent drug being predominantly (->-90%) eliminated unchanged in faeces.
Proguanil hydrochloride is partially metabolised, primarily by the polymorphic cytochrome P450 isoenzyme 2C19, with less than 40% being excreted unchanged in the urine. Its metabolites, cycloguanil and 4-chlorophenylbiguanide, are also excreted in the urine.
During administration of atovaquone and proguanil hydrochloride at recommended doses proguanil metabolism status appears to have no implications for treatment or prophylaxis of malaria.
Elimination
The elimination half life of atovaquone and proguanil hydrochloride is 1-2 days in children.
The elimination half lives of proguanil and cycloguanil are each about 12-15 hours in children.
Oral clearance for atovaquone and proguanil hydrochloride increases with increased body weight and is about 70% higher in a 40 kg subject relative to a 20 kg subject. The mean oral clearance in paediatric and adult patients weighing 5 to 40 kg ranged from 0.5 to 6.3 L/h for atovaquone and from 8.7 to 64 L/h for proguanil hydrochloride.
Pharmacokinetics in renal impairment
There are no studies in children with renal impairment.
In adult patients with mild to moderate renal impairment, oral clearance and/or AUC data for atovaquone and proguanil hydrochloride, proguanil and cycloguanil are within the range of values observed in patients with normal renal function.
Atovaquone and proguanil hydrochloride Cmax and AUC are reduced by 64% and 54%, respectively, in adult patients with severe renal impairment (<30 mL/min/1.73 m2).
In adult patients with severe renal impairment, the elimination half lives for proguanil (t½ 39 hours) and cycloguanil (t½ 37 hours) are prolonged, resulting in the potential for drug accumulation with repeated dosing (see sections 4.2 and 4.4).
Pharmacokinetics in hepatic impairment
There are no studies in children with hepatic impairment.
In adult patients with mild to moderate hepatic impairment, there is no clinically significant change in exposure to atovaquone and proguanil hydrochloride when compared to healthy patients. In adult patients with mild to moderate hepatic impairment there is an 85% increase in proguanil AUC, with no change in elimination half life, and there is a 65-68% decrease in Cmax and AUC for cycloguanil.
No data are available in adult patients with severe hepatic impairment (see section 4.2).
 

5.3 Preclinical safety data
Repeat dose toxicity:
Findings in repeat dose toxicity studies with atovaquone/ proguanil hydrochloride combination were entirely proguanil- related and were observed at doses providing no significant margin of exposure in comparison with the expected clinical exposure. However, as proguanil has been used extensively and safely in the treatment and prophylaxis of malaria at doses similar to those used in the combination, these findings are considered of little relevance to the clinical situation.

Reproductive toxicity studies:
In rats and rabbits there was no evidence of teratogenicity for the combination. No data are available regarding the effects of the combination on fertility or pre- and post-natal development, but studies on the individual components of atovaquone and proguanil hydrochloride have shown no effects on these parameters. In a rabbit teratogenicity study using the combination, unexplained maternal toxicity was found at a systemic exposure similar to that observed in humans following clinical use.
Mutagenicity: A wide range of mutagenicity tests have shown no evidence that atovaquone or proguanil have mutagenic activity as single agents.
Mutagenicity studies have not been performed with atovaquone and proguanil hydrochloride in combination with proguanil.
Cycloguanil, the active metabolite of proguanil, was also negative in the Ames test, but was positive in the Mouse Lymphoma assay and the Mouse Micronucleus assay. These positive effects with cycloguanil (a dihydrofolate antagonist) were significantly reduced or abolished with folinic acid supplementation.
Carcinogenicity: Oncogenicity studies of atovaquone and proguanil hydrochloride alone in mice showed an increased incidence of hepatocellular adenomas and carcinomas. No such findings were observed in rats and mutagenicity tests were negative. These findings appear to be due to the inherent susceptibility of mice to atovaquone and proguanil hydrochloride and are considered of no relevance in the clinical situation.
Oncogenicity studies on proguanil alone showed no evidence of carcinogenicity in rats and mice. Oncogenicity studies on proguanil in combination with atovaquone and proguanil hydrochloride have not been performed.

6.1 List of excipients
Atovaquone and proguanil hydrochloride:
The other ingredients are: Cellulose, microcrystalline (Avicel PH 101), Low-Substituted Hydroxylpropyl cellulose (L-HPC LH 21), Sodium starch glycolate (Primojel), Silica colloidal anhydrous (Aerosil 200), Povidone (kollidon-30), Poloxamers (Lutrol F 68), Low-Substituted Hydroxylpropyl cellulose (L-HPC LH 11), Magnesium Stearate and Purified Water.
Film coating composition: HPMC 2910/Hypromellose 3cP, Titanium Dioxide, HPMC 2910/Hypromellose 15cP, HPMC 2910/Hypromellose 50 cP, Macrogol/PEG 8000, Macrogol/PEG 400, Iron Oxide Red.

Not applicable

Store below 30ºC.

10’s Blister Pack.

No special requirements.
Any unused product or waste material should be disposed of in accordance with local requirements.