Enalapril (Renitec) Tablet Side Effects (Nuksanat)
Enalapril (Renitec / Enapril) is generally well-tolerated. The most common side effect is a dry persistent cough — this is not an allergy, it is a pharmacological effect. The most serious (rare) side effect is angioedema — this is an EMERGENCY.
Common Side Effects (Aam Nuksanat)
- Dry persistent cough — most common; caused by bradykinin; up to 30% of South Asians; not an allergy — switch to ARB if intolerable
- Hypotension (low BP) — especially with the first dose or in volume-depleted patients; stand up slowly
- Dizziness / headache — mild; usually settles
- Hyperkalaemia — elevated potassium; muscle weakness, irregular heartbeat; higher risk with NSAIDs
- Transient creatinine rise — mild renal impairment — usually acceptable; the doctor monitors this
- Fatigue
Serious Side Effects (Sanjeedah Nuksanat — FORAN Action Zaroorat)
- Angioedema — LIFE-THREATENING EMERGENCY:
- Swelling of mouth, lips, tongue, or throat — risk of airway obstruction
- IMMEDIATELY: Stop the drug, call 115, go to the emergency room
- NEVER use enalapril if you have a prior history of angioedema
- Acute Kidney Injury (AKI) — triple whammy (ACEi + diuretic + NSAID) — severe renal failure
- Severe hyperkalaemia — cardiac arrhythmia — irregular heartbeat, muscle paralysis
- Severe renal impairment — in bilateral renal artery stenosis
- Teratogenicity — pregnancy Category D — foetal renal failure, oligohydramnios
- Neutropaenia (rare — immunosuppressed patients)
When to See a Doctor (Kab Doctor Se Milna Zaroori Hai)
- EMERGENCY: Swelling of mouth / lips / tongue / throat — angioedema — call 115 IMMEDIATELY
- Severe dizziness or fainting — first-dose hypotension
- Markedly reduced urine output — renal failure
- Irregular heartbeat — hyperkalaemia
- Intolerable cough — discuss ARB switch with doctor
- Muscle weakness or numbness
Warnings and Precautions
- Know the signs of angioedema — this is an emergency
- Triple whammy — avoid ACEi + diuretic + NSAID — AKI risk
- Renal function and potassium: check 1–2 weeks after starting
- PREGNANCY CONTRAINDICATED — Category D
- Bilateral renal artery stenosis — CONTRAINDICATED
- Prior angioedema — CONTRAINDICATED
ACE Inhibitor Cough — Patient Guide
| Question | Answer |
|---|---|
| When does the cough start? | Days to weeks — usually 1–4 weeks after starting |
| Is it serious? | No — but annoying. It takes time to resolve after stopping |
| Is it an allergy? | No — pharmacological bradykinin effect |
| What to do? | Tell your doctor — ARB (losartan/valsartan) switch is possible |
| After stopping? | Resolves in 1–4 weeks |
Side Effects Summary Table
| Type | Side Effect | Action |
|---|---|---|
| Very Common | Dry persistent cough | Tell your doctor — ARB switch possible |
| Common | First-dose hypotension | Start low dose; stand up slowly |
| Common | Hyperkalaemia | Blood test; avoid NSAIDs |
| Serious | Angioedema | EMERGENCY — 115 call, stop drug |
| Serious | AKI (triple whammy) | NSAIDs avoid strictly |
| Pregnancy | Teratogenicity | CONTRAINDICATED |
Reporting Side Effects
If you notice any unexpected side effect, report it on the DRAP pharmacovigilance portal: https://www.dra.gov.pk/pharmacovigilance
The information in this guide is for educational purposes only. If you notice any side effect, contact your doctor or pharmacist.