Ketoral Ketoconazole Mefloquine
MajorTaking mefloquine with ketoconazole can increase the risk of QT prolongation and arrhythmia (irregular heartbeats).
These medicines can affect each other in a serious way. Do not start taking them together unless your doctor has said it is OK. If you already take both, do not stop either one on your own: speak to your doctor or pharmacist soon.