More Medications That Interfere With Atazanavir
Atazanavir should not be combined with midazolam or triazolam, due to the risk of life-threatening reactions.
Certain Calcium Channel Blockers
Atazanavir may increase the level of calcium channel blockers in your blood, possibly increasing the risk of side effects. Combining atazanavir with certain calcium channel blockers may also affect your heart rhythm. Your healthcare provider may need to lower the dose of your calcium channel blocker to prevent this interaction from occurring.
Atazanavir may increase the level of colchicine in your blood. Your healthcare provider may need to lower your colchicine dosage while you are taking atazanavir.
Atazanavir and didanosine products should not be taken at the same time. Be sure to take these products at different times of the day.
Efavirenz can lower the level of atazanavir in your blood, perhaps making it less effective. Your healthcare provider may need to adjust your dose of these medications, and in some cases, this combination is not recommended (see Atazanavir Dosing).
Atazanavir should not be combined with ergot medications, due to the risk of dangerous side effects.
Fluticasone or Combination Medications That Contain Fluticasone
Atazanavir may increase the level of fluticasone in your blood. Check with your healthcare provider before taking these medications together.
Taking an H2 blocker with atazanavir can decrease the level of atazanavir in your blood. Check with your healthcare provider before taking the medications together (including non-prescription versions of H2 blockers). There are specific recommendations available, depending on several factors (see Atazanavir Dosing).