Pregnant women: Contraindicated: can cause renal failure in the neonate.

Nursing mothers: Only small amounts are detectable in breast milk. The manufacturers advise against breast-feeding regardless.

Children: It is effective in children with hypertension and heart failure. Usual dose: 1 to 3 mg/kg/day.

Elderly people: Can be given to the elderly. Monitor renal functions and potential hypotension!

Renal failure: Reduce dose and/or frequency of administration! Cautious dose increase! The daily dose for dialysis patients is 25 to 50 mg.

Liver insufficiency: No noteworthy problems.