Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Some products that may interact with this drug include: orlistat, rifabutin, warfarin.

Other medications can affect the removal of nevirapine from your body, which may affect how nevirapine works. Examples include rifamycins (such as rifampin), St. John's wort, among others.

Nevirapine can speed up the removal of many other medications from your body, which may affect how they work. Examples of affected drugs include antiarrhythmics (such as amiodarone), asunaprevir, atazanavir, cobicistat, elvitegravir, some drugs used to treat seizures (such as clonazepam), azole antifungals (such as itraconazole, ketoconazole), macrolide antibiotics (such as clarithromycin), methadone, among others.

Do not use prednisone to prevent a rash because it can actually increase the risk of a rash during the first 6 weeks of nevirapine treatment. Ask your doctor for more details.

This medication may decrease the effectiveness of hormonal birth control such as pills, patch, or ring. This could cause pregnancy. Discuss with your doctor or pharmacist if you should use reliable backup birth control methods while using this medication. Also tell your doctor if you have any new spotting or breakthrough bleeding, because these may be signs that your birth control is not working well.