Increased antihypertensive effect w/ baclofen. Increased risk of angioedema w/ sacubitril/valsartan. May increase risk of angioedema w/ racecadotril, mTOR inhibitors (eg, sirolimus, everolimus, temsirolimus) & gliptins (eg, linagliptin, saxagliptin, sitagliptin, vidagliptin). May increase hypotensive effects w/ antihypertensive agents (eg, β-blockers) & vasodilators. May further reduce BP w/ nitroglycerine & other nitrates or vasodilators. Reduced antihypertensive effects w/ corticosteroids, tetracosactide. Increased antihypertensive effect & risk of orthostatic hypotension w/ α-blockers (prazosin, alfuzosin, doxazosin, tamsulosin, terazosin); TCAs, antipsychotics, anesth. May potentiate antihypertensive effect w/ amifostine. Perindopril: Increased risk of hyperkalemia w/ aliskiren, K salts, K-sparing diuretics (eg, triamterene, amiloride, eplerenone, spironolactone), ACE inhibitors, AIIAs, NSAIDs, heparins, immunosuppressant agents (eg, ciclosporin or tacrolimus), trimethoprim & fixed dose combination w/ sulfamethoxazole (co-trimoxazole). Increased risk of severe anaphylactoid reactions w/ extracorporeal treatments eg, dialysis or hemofiltrations w/ certain high-flux membranes (eg, polyacrylonitrile membranes) & LDL apheresis w/ dextran sulphate. Increased risk of angioedema w/ estramustine. Reversible increases in serum lithium conc & toxicity (severe neurotoxicity). Increased blood-glucose lowering effect w/ risk of hypoglycemia w/ antidiabetic medicines (insulins, oral hypoglycemic agents). Excessive reduction in BP w/ non-K-sparing diuretics. Attenuated antihypertensive effect w/ NSAIDs (ie, aspirin ≥3 g/day, COX-2 inhibitors & non-selective NSAIDs). Increased risk of worsening of renal function, including possible acute renal failure, & increase in serum K w/ NSAIDs especially in patients w/ poor preexisting renal function. May reduce antihypertensive effects w/ sympathomimetics. Nitritoid reactions w/ inj gold (Na aurothiomalate). Amlodipine: Hyperkalemia w/ dantrolene IV. Plasma conc may vary w/ CYP3A4 inducers (eg, rifampicin,
Hypericum perforatum). Increased exposure w/ strong or moderate CYP3A4 inhibitors [PIs, azole antifungals, macrolides (eg, erythromycin or clarithromycin), verapamil or diltiazem]. Increased risk of hypotension w/ clarithromycin. Additive BP-lowering effects of other medicinal products w/ antihypertensive properties. Risk of increased tacrolimus blood levels. May increase exposure of mTOR inhibitors (eg, sirolimus, temsirolimus, & everolimus). Increased variable trough conc of ciclosporin. Increased exposure to simvastatin. May increase bioavailability w/ grapefruit or grapefruit juice