Irbesartan: Increased C
max & AUC of repaglinide. Increased serum K w/ K-sparing diuretics, K supplements or K-containing salt substitutes or other medications that may increase kalaemia. Attenuated antihypertensive effect w/ NSAIDs including COX-2 inhibitors. Increased serum conc & toxicity of lithium. Amlodipine: Increased bioavailability resulting in increased BP-lowering effects w/ grapefruit or grapefruit juice. Exposure may be increased w/ strong or moderate CYP3A4 inhibitors eg, PIs, azole antifungals, macrolides (eg, erythromycin or clarithromycin), verapamil or diltiazem. May cause variations in plasma conc w/ CYP3A4 inducers eg, rifampicin,
Hypericum perforatum. Risk of hyperkalemia w/ dantrolene infusion. Additive BP-reducing effects w/ other medicinal products w/ antihypertensive properties. Increased risk of blood tacrolimus levels. Increase in min conc of cyclosporine. May increase exposure of molecular target of rapamycin (mTOR) inhibitors eg, sirolimus, temsirolimus, everolimus; simvastatin.