Bredicon Desogestrel Ritonavir
ModerateRitonavir is on the list of medicines that can make Desogestrel work less well, along with hydantoins, barbiturates, primidone, carbamazepine, rifampicin, oxcarbazepine, rifabutin, felbamate, griseofulvin and St John's Wort products.
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.