Quinine Sulphate Rifampicin + Isoniazid
ModerateThe leaflet text says that rifampicin may lower the blood levels of many other medicines, but quinine sulphate is not named in the part that is available, so no effect of this combination on quinine can be stated from it.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.