Medicinal products which should not be given with Invirase/ritonavir include: • terfenadine, astemizole, pimozide, cisapride, amiodarone, propafenone and flecainide (potential for life threatening cardiac arrhythmia) • midazolam administered orally (for caution on parenterally administered midazolam, see section 4.5), triazolam (potential for prolonged or increased sedation, respiratory depression) • simvastatin, lovastatin (increased risk of myopathy including rhabdomyolysis) • ergot alkaloids (e.g. ergotamine, dihydroergotamine, ergonovine, and methylergonovine) (potential for acute ergot toxicity) • rifampicin (risk of severe hepatocellular toxicity) (see sections 4.4, 4.5, and 4.8).