You should not use this medicine if you have had an allergic reaction to halofantrine. Tell your doctor if you know that you have a heartbeat that is not normal (irregular heartbeat) or if family members have a heartbeat that is not normal.
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
You should not use this medicine with mefloquine (Lariam®). Make sure your doctor knows if you are using amiodarone (Cordarone®), astemizole (Hismanal®), bepridil (Vascor®), cisapride (Propulsid®), erythromycin (E.E.S.®, E-mycin®, Eryc®, EryPed®, Ery-Tab®, Erythrocin®, P.C.E.®), procainamide (Procanbid®, Procan S.R.®, Promine®, Pronestyl®), quinidine (Quinidex Extentabs®, Cardioquin®, Quinaglute Dura-Tabs®), sotalol (Betapace®), and terfenadine (Seldane®, Seldane-D®). These medicines used with halofantrine may cause serious heart problems.
If you are pregnant or breastfeeding, talk to your doctor before using this medicine.
Use this medicine exactly as your doctor prescribed. You should not use more than your doctor ordered.
It is important that you take this medicine on an empty stomach and not with food. Taking this medicine with food can increase the amount of medicine your body absorbs, which can cause serious side effects.
You may have tests before and after you use this medicine to make sure your heart is beating normally. The test is called an ECG (electrocardiogram). It is a painless test that shows the tracing of each heartbeat.