Drug Interaction Report

Using phenylephrine together with a beta-blocker like levobunolol ophthalmic may lead to an increase in blood pressure. Some beta-blockers may enhance the effects of phenylephrine, which can lead to constriction of your blood vessels and an increase in blood pressure. Contact your doctor if your condition changes. You may need a dose adjustment or your blood pressure checked more often if you use both medications. 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.