Drug Interaction Report

Before you undergo any procedure where halothane may be used, let your doctor know if you are currently using phenylephrine. Combining these medications may cause irregular heart rhythm. You should be closely monitored by the doctor during the procedure, and the dosage of phenylephrine adjusted as necessary. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Both phenylephrine and caffeine can increase blood pressure and heart rate, and combining them may enhance these effects. Talk to your doctor before using these medications, especially if you have a history of high blood pressure or heart disease. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Contact your doctor if your condition changes or you experience increased side effects. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.