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Enalapril is a well-established ACE inhibitor for high blood pressure and heart failure. It lowers blood pressure and takes strain off the heart – but it can trigger a dry cough. Here you will learn how it works, how it is dosed and when switching to a sartan makes sense.
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Never stop taking enalapril on your own. Suddenly stopping can cause a sharp rise in blood pressure and put strain on the heart and blood vessels – always discuss any changes with your GP practice. Enalapril (brand name Xanef®) is an ACE inhibitor and one of the longest-established blood-pressure-lowering drugs. It lowers blood pressure, takes strain off the heart and is used both for high blood pressure and for heart failure. Enalapril is what is known as a prodrug: only in the body is it converted into the actual active substance, enalaprilat.
| Property | Details |
|---|---|
| Active substance | Enalapril |
| Brand name | Xanef® |
| ATC code | C09AA02 |
| Drug class | ACE inhibitor |
| Formulation | Tablets 5, 10, 20 mg |
| Intake | 1–2× daily, regardless of meals |
| Standard dose | 10–20 mg/day (titrated up gradually) |
| Prescription required | Yes |
| Key point | Dry cough is the most common reason for discontinuation; not during pregnancy |
The body has a hormonal control system that regulates blood pressure – the renin-angiotensin system. A key enzyme within it is ACE (angiotensin-converting enzyme). It produces the hormone angiotensin II, which narrows the blood vessels and drives blood pressure up. Enalapril inhibits this enzyme: less angiotensin II means wider blood vessels and less retention of water and salt – blood pressure falls and the heart has to pump against less resistance.
That is why enalapril helps with several cardiovascular problems: in high blood pressure it lowers the pressure long-term, and in heart failure it relieves the weakened heart and has been shown to improve the prognosis. The full effect builds up over several days to weeks – enalapril works preventively, not as an acute remedy.
Enalapril is dosed gradually: you start low and increase the dose step by step until blood pressure is in the target range. This avoids too sharp a drop in blood pressure at the start (first-dose effect).
| Situation | Dose |
|---|---|
| Starting dose for high blood pressure | 5 mg 1×/day |
| Usual maintenance dose | 10–20 mg/day |
| Maximum dose | up to 40 mg/day (split into 2 doses if needed) |
| Heart failure start | 2.5 mg/day, increased slowly |
| Reduced kidney function | lower dose, close monitoring |
A missed dose is taken as soon as you notice – unless the next dose is due shortly. In that case the missed dose is skipped and you never take a double amount. What generally applies to a missed dose is explained in the guide Forgot your medication.
brite reminds you to take your enalapril and documents your blood-pressure readings seamlessly.
Like Ramipril, enalapril belongs to the ACE inhibitors. The so-called sartans such as Candesartan or Valsartan act on the same control chain but cause practically no dry cough – which is why they are the typical alternative when an ACE inhibitor is not tolerated.
| Property | Enalapril | Ramipril | Sartans (e. g. Candesartan) |
|---|---|---|---|
| Class | ACE inhibitor | ACE inhibitor | AT1 blocker |
| Intake | 1–2× daily | 1× daily | 1× daily |
| Dry cough | Possible (common) | Possible (common) | Very rare |
| Angioedema risk | Low, but present | Low, but present | Even rarer |
| Typical use | High blood pressure, heart failure | High blood pressure, heart failure | Alternative when ACE inhibitors are not tolerated |
Which drug is right depends on tolerability, concomitant conditions and kidney values. ACE inhibitors and sartans are not combined with each other. The decision is always made by the doctor.
The typical and most common side effect of ACE inhibitors is a dry cough. It arises because, alongside the blood-pressure hormone, ACE inhibitors also raise the messenger substance bradykinin, which irritates the airways. This cough is harmless but often persistent – and the most common reason enalapril is discontinued.
| Side effect | Frequency | What to do? |
|---|---|---|
| Dry cough | Common | Raise it with your GP practice; often a switch to a sartan |
| Dizziness, low blood pressure | Common | Stand up slowly; have the dose reviewed |
| Raised potassium, rising kidney values | Occasional | Blood test; adjust the dose |
| Angioedema (swelling of face/tongue) | Rare | Emergency – call 112 immediately |
A persistent cough while on enalapril is no reason to simply keep suffering: in many cases a switch is made to a sartan, which offers the same benefit without the cough. But do not stop the medication yourself – raise it with your GP practice.
While on enalapril, kidney values and potassium in the blood are checked regularly – especially at the start and after each dose increase. Many interactions concern precisely these two values. Check combinations in the Interaction Check.
| Substance / medication | Interaction | Recommendation |
|---|---|---|
| NSAIDs (ibuprofen, diclofenac) | Weaken the effect, strain the kidney | Avoid; prefer paracetamol |
| Potassium-sparing diuretics, potassium supplements | Risk of high potassium | Combine only with blood testing |
| Sartans (candesartan, valsartan) | Do not combine with an ACE inhibitor | No dual blockade |
| Lithium | Lithium levels can rise | Monitor levels closely |
Enalapril must not be taken during pregnancy – especially from the second and third trimester it can seriously harm the unborn child. Anyone who is pregnant, wishes to become pregnant or could be should discuss this with their GP practice without delay; a safe blood-pressure-lowering drug is then used instead. During breastfeeding, too, there are usually better-suited alternatives.
The full blood-pressure effect only appears after a few weeks. Measure your blood pressure regularly and record the readings – this helps your GP practice see whether the dose is right. A digital medication plan helps you keep an overview of all your medicines.
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