Drug Interactions
Ritonavir interacts with many medications. Ritonavir interacts with many medications. Your doctor or pharmacist may already be aware of any possible Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not drug interactions and may be monitoring you for them. Do not start, stop or change the dosage of any medicine before checking start, stop or change the dosage of any medicine before checking with your doctor or pharmacist first. with your doctor or pharmacist first. This drug should not be used with the following medications This drug should not be used with the following medications because very serious interactions may occur: alfuzosin, certain because very serious interactions may occur: alfuzosin, certain antiarrhythmics (amiodarone, flecainide, propafenone, quinidine), antiarrhythmics (amiodarone, flecainide, propafenone, quinidine), certain benzodiazepines (midazolam, triazolam), bosentan, certain benzodiazepines (midazolam, triazolam), bosentan, conivaptan, disulfiram, eletriptan, ergot alkaloids (such as conivaptan, disulfiram, eletriptan, ergot alkaloids (such as dihydroergotamine, ergonovine, ergotamine, methylergonovine), dihydroergotamine, ergonovine, ergotamine, methylergonovine), pimozide, ranolazine, certain "statin" cholesterol drugs pimozide, ranolazine, certain "statin" cholesterol drugs (simvastatin, lovastatin), St John's wort, voriconazole. (simvastatin, lovastatin), St John's wort, voriconazole. If you are currently using any of these medications listed If you are currently using any of these medications listed above, tell your doctor or pharmacist before starting ritonavir. above, tell your doctor or pharmacist before starting ritonavir. Other medications can affect the removal of ritonavir from Other medications can affect the removal of ritonavir from your body, which may affect how ritonavir works. Examples include your body, which may affect how ritonavir works. Examples include rifampin, other HIV drugs (such as delavirdine), among others. rifampin, other HIV drugs (such as delavirdine), among others. Ritonavir can slow down or speed up the removal of other Ritonavir can slow down or speed up the removal of other medications from your body, which may affect how they work. medications from your body, which may affect how they work. Examples of affected drugs include digoxin, theophylline, Examples of affected drugs include digoxin, theophylline, warfarin, certain antiarrhythmics (including disopyramide, warfarin, certain antiarrhythmics (including disopyramide, mexiletine), antidepressants (such as bupropion, fluoxetine, mexiletine), antidepressants (such as bupropion, fluoxetine, nefazodone, trazodone), certain beta blockers (metoprolol, nefazodone, trazodone), certain beta blockers (metoprolol, timolol), calcium channel blockers (such as nifedipine, timolol), calcium channel blockers (such as nifedipine, felodipine), some cancer drugs (such as dasatinib, sunitinib, felodipine), some cancer drugs (such as dasatinib, sunitinib, vincristine), certain azole fungal medications (ketoconazole, vincristine), certain azole fungal medications (ketoconazole, itraconazole), other HIV drugs (including atazanavir, saquinavir, itraconazole), other HIV drugs (including atazanavir, saquinavir, didanosine, maraviroc), anti-seizure drugs (including didanosine, maraviroc), anti-seizure drugs (including carbamazepine, phenytoin), drugs to treat erectile carbamazepine, phenytoin), drugs to treat erectile dysfunction/pulmonary hypertension (such as sildenafil, dysfunction/pulmonary hypertension (such as sildenafil, vardenafil), certain "statin" cholesterol drugs (atorvastatin, vardenafil), certain "statin" cholesterol drugs (atorvastatin, rosuvastatin), certain narcotic pain medications (methadone, rosuvastatin), certain narcotic pain medications (methadone, meperidine, propoxyphene), among others. meperidine, propoxyphene), among others. If any of these medications are taken with ritonavir, your If any of these medications are taken with ritonavir, your doctor may change your dose of ritonavir or the other drug(s), or doctor may change your dose of ritonavir or the other drug(s), or your doctor may monitor you specially. Consult your doctor or your doctor may monitor you specially. Consult your doctor or pharmacist for more details. pharmacist for more details. This medication may decrease the effectiveness of some birth This medication may decrease the effectiveness of some birth control pills. This can result in pregnancy. However, to reduce control pills. This can result in pregnancy. However, to reduce the risk of spreading HIV to others, always use barrier the risk of spreading HIV to others, always use barrier protections during all sexual activity. (See also Notes section.) protections during all sexual activity. (See also Notes section.) This document does not contain all possible interactions. This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and medications with you, and share the list with your doctor and pharmacist. pharmacist.