Hypover Verapamil Hydrochloride Fentanyl Citrate
MajorVerapamil can raise the level of fentanyl in your blood. When that happens, fentanyl's side effects can get stronger or last longer. It can also slow your breathing to a dangerous level, which can be fatal. If you take both, your doctor should know so they can watch you closely.
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.