Avloclor (chloroquine 250mg)

Avloclor (Chloroquine), an anti-malarial medicine used to prevent malaria is available from the Medicinesbymailbox Pharmacy.

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Avloclor (chloroquine 250mg)

Avloclor (chloroquine 250mg)

Prescription fees

Medicinesbymailbox supplies medicine on prescription and charges a small prescription fee based on the order value of each prescription.Prescriptions are issued by our doctors online and sent electronically to our pharmacy.If you have your own private paper prescription please post to our pharmacy (details).

Order value Prescription fee
Any Order Value £0.00

Avloclor product information

Avloclor contains an 'anti-malarial' medicine called chloroquine. 
Malaria is caused by the bite of an infected mosquito which spreads the malaria parasite, P.falciparum. The active ingredient kills the parasites in the blood. Avloclor is used to prevent malaria.

Note: no anti-malarial tablet is 100% effective against malaria and you may need additional measures to prevent getting bitten by infected mosquitoes. Visit our page for malaria for specific medical information.

How to take

You may need to start taking the tablets for a specific time period before and after entering malaria risk areas. Always take this medicine exactly as your doctor or pharmacist tells you to. The usual dose for malaria prevention is to take two avloclor tablets once a week on the same time each week. You should start taking the tablets a week before entering malarial areas and continue with this medicine throughout until 4 weeks after leaving the area. It is important to finish the whole course of medicine to gain adequate protection.
It is preferable to take this medicine after food and swallow the tablets with a drink of water. 

Side effects of Avloclor

Like all medicines, chloroquine/proguanil can cause some side effects, although not everyone gets them.
Some common side effects include stomach upset such as diarrhoea, nausea and vomiting and headache. It is important that if you experience dizziness or blurred vision that you avoid driving or using machinery.
Chloroquine can also cause low blood glucose level. Your doctor will be able to tell you how to recognise signs of symptoms of that.

If you experience serious side effects such as heart rhythm problems, severe rash with blisters on the skin, convulsions or fits and loss of eyesight, you should speak to a doctor urgently.

For a full list of side effects, please refer to the patient information leaflet attached below.
If you notice severe allergic reaction with symptoms such as rash and itching, swollen eyes, face or lips and difficulty breathing, you should stop taking the combination pack and seek medical advice immediately.


During a Medicinesbymailbox online consultation, you will be required to complete an assessment questionnaire to determine your suitability for anti-malarial medication. You should not take Malarone without consulting a doctor if you:
  • Are allergic to chloroquine 
  • Are taking a medicine used to control heart rate called amiodarone
  • Have liver or kidney disease
  • Have ever had convulsions or fits

Chloroquine may cause heart rhythm disorders in some patient. You should check with your doctor or pharmacist if you were born with or have family history of a medical condition in the heart called prolonged QT interval, if you have heart disorders or have a history of heart attack.

You are advised to speak to a doctor or pharmacist before taking the tablets if you are pregnant or breast feeding.

Some medicines can also interfere with how the medication works, for example some anti-convulsant medicines and praziquantel, a medicine used to treat infections of the bowel or bladder. If you are unsure, you should check with a doctor or pharmacist for advice.

Some indigestion remedies might affect absorption of Avloclor so they should not be taken four hours before and after Avloclor is administered.

Medicinesbymailbox can only prescribe medicine to adults (18 years or over). 

Patient information leaflet – Malarone

The 'Patient Information Leaflets' supplied with medication must be read before taking tablets.