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ACE Inhibitor Pregnancy: Not recommended during the first trimester and contraindicated during the second and third trimesters of pregnancy. ACE inhibitor exposure in the second and third trimesters induces human foetotoxicity (decreased renal function, oligohydramnios, skull ossification retardation) and neonatal toxicity (renal failure, hypotension, hyperkalaemia). Not recommended during breast-feeding.

Ramipril

Brand names: Tritace

Ramipril is an angiotensin-converting enzyme (ACE) inhibitor used to treat hypertension, heart failure, diabetic and non-diabetic nephropathy, and for cardiovascular risk reduction in patients with established vascular disease.

Auto-extracted from the source labelling — not yet independently clinician-verified. These values were distilled from the UK SPC (or the US label where noted) but have not had a clinician sign-off. Confirm against the current SmPC before prescribing.

Adult dose

Dose: Hypertension: initial 2.5 mg once daily; the dose can be doubled at intervals of two to four weeks to progressively achieve target blood pressure
Route: Oral — swallowed with liquid; must not be chewed or crushed; may be taken before, with or after meals, at the same time each day
Frequency: Usually once daily
Max: 10 mg daily
eMC SPC for Ramipril 10 mg Tablets. A starting dose of 1.25 mg is recommended in patients with a strongly activated renin-angiotensin-aldosterone system, and treatment should be initiated under medical supervision. In hypertensive patients in whom a diuretic is not discontinued, initiate at 1.25 mg (if possible stop the diuretic 2-3 days before starting) and monitor renal function and serum potassium. Cardiovascular prevention: initial 2.5 mg once daily; double after one or two weeks, then after a further two to three weeks increase to the target maintenance dose of 10 mg once daily. Diabetes with microalbuminuria, and non-diabetic nephropathy with macroproteinuria >= 3 g/day: initial 1.25 mg once daily, doubling to 2.5 mg after two weeks and then to 5 mg after a further two weeks. Diabetes with at least one cardiovascular risk: initial 2.5 mg once daily, doubling to 5 mg after one or two weeks and then to 10 mg after a further two or three weeks (target 10 mg daily). Symptomatic heart failure (patients stabilised on diuretic therapy): initial 1.25 mg daily, titrated by doubling every one to two weeks up to a maximum daily dose of 10 mg; two administrations per day are preferable. Secondary prevention after acute myocardial infarction with heart failure: from 48 hours after MI in a clinically and haemodynamically stable patient, 2.5 mg twice daily for three days; if 2.5 mg is not tolerated give 1.25 mg twice daily for two days before increasing to 2.5 mg and then 5 mg twice daily; subsequently double at intervals of one to three days up to the target maintenance dose of 5 mg twice daily; if the dose cannot be increased to 2.5 mg twice daily the treatment should be withdrawn. Severe (NYHA IV) heart failure immediately after MI: experience is lacking; if treated, start at 1.25 mg once daily with particular caution on dose increase. Hepatic impairment: initiate only under close medical supervision; maximum daily dose 2.5 mg. Elderly: lower initial doses and more gradual titration; a reduced initial dose of 1.25 mg should be considered. The §4.2 paediatric population text was truncated in the fetched source, so no paediatric posology could be extracted — clinician to verify against a children's formulary.

Dose adjustments

Renal

Daily dose should be based on creatinine clearance: CrCl >= 60 ml/min — no adjustment of the initial dose (2.5 mg/day), maximum daily dose 10 mg; CrCl 30-60 ml/min — no adjustment of the initial dose (2.5 mg/day), maximum daily dose 5 mg; CrCl 10-30 ml/min — initial dose 1.25 mg/day, maximum daily dose 5 mg; haemodialysed hypertensive patients — ramipril is slightly dialysable, initial dose 1.25 mg/day and maximum daily dose 5 mg, administered a few hours after haemodialysis.

Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC; US FDA prescribing information (openFDA / DailyMed) — cross-check; US labelling may differ from UK — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.

Contraindications

  • Hypersensitivity to the active substance, to any of the excipients, or to any other ACE inhibitor
  • History of angioedema (hereditary, idiopathic, or due to previous angioedema with ACE inhibitors or AIIRAs)
  • Concomitant use with sacubitril/valsartan therapy
  • Extracorporeal treatments leading to contact of blood with negatively charged surfaces
  • Significant bilateral renal artery stenosis, or renal artery stenosis in a single functioning kidney
  • Second and third trimesters of pregnancy
  • Hypotensive or haemodynamically unstable states
  • Concomitant use with aliskiren-containing products in patients with diabetes mellitus or renal impairment (GFR < 60 ml/min/1.73 m2)

Side effects

  • Non-productive tickling cough, bronchitis, sinusitis, dyspnoea (common)
  • Headache, dizziness (common)
  • Hypotension, orthostatic blood pressure decreased, syncope (common)
  • Blood potassium increased (common)
  • Gastrointestinal inflammation, digestive disturbances, abdominal discomfort, dyspepsia, diarrhoea, nausea, vomiting (common)
  • Serious reactions include angioedema, hyperkalaemia, renal or hepatic impairment, pancreatitis, severe skin reactions and neutropenia/agranulocytosis

Interactions

  • Sacubitril/valsartan — concomitant use is contraindicated (§4.3)
  • Aliskiren-containing products — contraindicated in patients with diabetes mellitus or renal impairment (GFR < 60 ml/min/1.73 m2); dual RAAS blockade with ACE inhibitors, angiotensin II receptor blockers or aliskiren is otherwise not recommended because of increased risk of hypotension, hyperkalaemia and decreased renal function (§4.3, §4.4)
  • Angiotensin II receptor blockers — should not be used concomitantly with an ACE inhibitor in patients with diabetic nephropathy (§4.4)
  • Diuretics — hypotension may occur on initiation; if possible discontinue the diuretic 2 to 3 days before starting ramipril, otherwise start at 1.25 mg (§4.2, §4.4)
  • Extracorporeal treatments leading to contact of blood with negatively charged surfaces — contraindicated (§4.3). Note: eMC §4.5 was not captured in the fetched source bundle; the full interactions section must be checked on the SPC.

Clinical monograph

How it works

It inhibits ACE, reducing the conversion of angiotensin I to angiotensin II, thereby causing vasodilatation, lowering aldosterone and reducing blood pressure and cardiac afterload.

Prescribing in practice

  • Angioedema is an uncommon but potentially life-threatening reaction that mandates immediate, permanent discontinuation, and the drug is contraindicated in pregnancy.
  • Check renal function and potassium before starting and after dose changes, as it can cause hyperkalaemia and acute kidney injury, particularly with NSAIDs, potassium-sparing agents or renal artery stenosis.
  • Counsel on the common dry cough and the risk of first-dose hypotension, especially in volume-depleted patients or those on diuretics.

Monitoring

Monitor blood pressure, renal function and serum potassium before initiation and after each dose increase, and periodically thereafter.

Counselling the patient

  • A persistent dry cough can occur; tell your doctor if it troubles you.
  • Do not use this medicine if you are or might become pregnant.
  • Report any swelling of the face, lips or throat immediately.

Evidence & guidelines

Ramipril's cardiovascular benefit is supported by the HOPE trial and it is recommended in NICE hypertension and heart failure guidance.

Reference: NICE NG136 (Hypertension); HOPE Trial (NEJM 2000); MHRA Safety Update; Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.