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Prescribing

ACE inhibitor start

Starting doses, titration targets, and monitoring essentials for ACE inhibitors.

Last reviewed 2026-01-05|cardio | renal | medication

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Dosing quick reference

Medication (generic)

Ramipril

Starting dose

2.5 mg once daily

Typical titration / target

Double every 2-4 weeks to 10 mg daily

Monitoring / notes

Check creatinine and potassium 7-14 days after start and dose changes.

Medication (generic)

Lisinopril

Starting dose

10 mg once daily

Typical titration / target

Titrate to 20-40 mg daily

Monitoring / notes

Avoid in pregnancy; watch for cough and angioedema.

Medication (generic)

Perindopril

Starting dose

4 mg once daily

Typical titration / target

Titrate to 8 mg daily

Monitoring / notes

Hold during dehydration or acute illness (sick day rules).

Contraindications

  • Avoid if there is prior ACE inhibitor-associated angioedema.
  • Avoid in known pregnancy.
  • Defer initiation during significant hypotension, volume depletion, or unresolved acute illness.

Renal and hepatic considerations

  • Review baseline renal function and potassium before initiation.
  • Expect up to a 30% rise in creatinine; larger rises need reassessment.
  • Use extra caution with advanced CKD, acute kidney injury risk, or concurrent nephrotoxic exposure.

Pregnancy and lactation cautions

  • ACE inhibitors are contraindicated in pregnancy; stop promptly and switch to a pregnancy-compatible option if pregnancy occurs.
  • Discuss contraception and preconception planning before initiation when relevant.
  • During lactation, confirm agent-specific compatibility and infant monitoring requirements.

Monitoring checkpoints

  • Recheck creatinine and potassium 7-14 days after initiation and after dose changes.
  • Reinforce home BP monitoring and follow-up within 4-6 weeks.
  • Review adverse effects (cough, dizziness, angioedema warning signs) at each contact.

Stop or escalate criteria

  • Stop immediately and escalate urgently for angioedema symptoms.
  • Stop and reassess if creatinine rises more than expected, clinically significant hyperkalemia develops, or symptomatic hypotension occurs.
  • Escalate to specialist support when BP remains uncontrolled after sequential optimization.