Increased BP lowering effect w/ other antihypertensive medicinal products. Potentiated hypotensive effects by baclofen, amifostine. Aggravated orthostatic hypotension by alcohol, barbiturates, narcotics or antidepressants. Reduced antihypertensive effect w/ systemic corticosteroids. Significant increase in serum K w/ K-sparing diuretics (eg, spironolactone, eplerenone, triamterene, or amiloride), K supplements, or K-containing salt substitutes. Reversible increases of serum lithium conc & toxicity. Reduced antihypertensive effects w/ NSAIDs. Increased AUC
0-24 & C
max of ramipril & ramiprilat. Amlodipine: Increased BP lowering effects w/ grapefruit or grapefruit juice. Increased plasma conc w/ strong CYP3A4 inhibitors (eg, erythromycin, ketoconazole, itraconazole, ritonavir). May lead to a lower plasma conc of amlodipine w/ CYP3A4 inducers (ie, rifampicin,
Hypericum perforatum). Increase in simvastatin exposure w/ amlodipine. May increase systemic exposure of ciclosporin or tacrolimus.