Other medicines that cannot be taken with VIRACEPT include rifampicin (used for treating bacterial infections), terfenadine or astemizole (commonly used to treat allergy symptoms), cisapride (for heart burn or problems with the digestive system), amiodarone or quinidine (used to treat an irregular heart beat), triazolam or oral midazolam (used to relieve anxiety and/or trouble with sleeping), omeprazole (used in the treatment of gastrointestinal ulcers), ergot derivatives (used to treat migraine), and pimozide (for psychiatric problems).