Perindopril

Perindopril is an ACE inhibitor approved for two main uses:

• High blood pressure (essential hypertension): Perindopril Erbumine tablets lower blood pressure and can be used alone or alongside other blood pressure medicines, particularly thiazide diuretics.
• Stable coronary artery disease: Perindopril Erbumine tablets reduce the risk of dying from a cardiovascular cause or suffering a nonfatal heart attack. They are used alongside other standard treatments such as antiplatelet therapy, blood pressure medicines, or cholesterol-lowering drugs.

Perindopril is a prodrug — your body converts it into its active form, perindoprilat, after you swallow it. Perindoprilat blocks ACE (angiotensin-converting enzyme), which is the enzyme your body uses to produce angiotensin II, a chemical that tightens blood vessels and raises blood pressure. By blocking this step, perindopril relaxes blood vessels, lowers blood pressure, and reduces fluid retention — all of which ease the strain on the heart and circulation.

In studies of Black patients — who tend to have lower levels of the hormone renin — perindopril's blood pressure-lowering effect was about half that seen in non-Black patients, a pattern consistent with other ACE inhibitors in this population.

Perindopril Erbumine tablets are taken by mouth, typically once a day, though some people take the dose in two smaller amounts throughout the day. They can be taken with or without food. During clinical trials, perindopril was generally taken without regard to meals.

• For high blood pressure, the dose is started low and increased gradually until blood pressure is well controlled.
• For stable coronary artery disease, the starting dose is taken for two weeks, then increased to a maintenance dose if tolerated.
• Older adults and people with kidney problems typically start at a lower dose with slower increases and closer monitoring.
• If you miss a dose, follow your pharmacist's or prescriber's guidance — do not double up without being told to.

The most common side effects include:

• Dry, persistent cough — this is the most frequently reported side effect with ACE inhibitors including perindopril, and it usually goes away after stopping the medicine
• Dizziness — more likely at higher doses
• Back pain
• Headache
• Fatigue or weakness
• Low blood pressure (hypotension) — especially when starting therapy or if you are dehydrated

Serious reactions to watch for include sudden swelling of the face, lips, tongue, or throat (angioedema — get emergency help immediately), signs of kidney problems such as reduced urination, high potassium levels, yellowing of the skin or eyes (jaundice), or a major drop in white blood cell count. Contact your doctor right away if any of these occur.

• Fetal toxicity (most critical): Perindopril can cause kidney damage, serious injury, and death to an unborn baby. Stop this medicine as soon as you know you are pregnant and call your doctor immediately.
• Angioedema (severe swelling): Swelling of the face, tongue, throat, or intestines can occur and may be life-threatening. Black patients face a higher risk. Patients taking mTOR inhibitors or neprilysin inhibitors (e.g., sacubitril/valsartan) also face higher risk. Seek emergency care immediately if this happens.
• Low blood pressure (hypotension): Most likely in people who are dehydrated, on diuretics, or have had prolonged salt restriction. Especially important to watch for during the first two weeks of therapy or after any dose increase.
• Kidney function changes: Perindopril can affect how well the kidneys work, particularly in people with existing kidney disease, severe heart failure, or narrowed kidney arteries. Regular monitoring is needed.
• High potassium (hyperkalemia): Risk increases with kidney disease, diabetes, or if you take potassium-sparing diuretics or potassium supplements.
• Rare serious risks: Very rarely, ACE inhibitors have been linked to a serious drop in white blood cells (agranulocytosis) and a liver condition that can progress to liver failure. Tell your doctor right away if you develop jaundice or unusual infections.

Perindopril can interact with several medicines and substances — always tell your prescriber and pharmacist everything you take:

• Diuretics (water pills): Can cause a sudden, significant drop in blood pressure, especially with the first dose.
• Potassium-sparing diuretics or potassium supplements: Increase the risk of dangerously high blood potassium levels.
• Lithium: Perindopril can raise lithium levels in the blood, potentially causing lithium toxicity; frequent monitoring is needed.
• Injectable gold (sodium aurothiomalate): Rare nitritoid reactions — flushing, nausea, vomiting, and low blood pressure — have been reported.
• NSAIDs (ibuprofen, naproxen, COX-2 inhibitors): Can blunt the blood pressure-lowering effect and increase the risk of kidney damage, especially in older adults or people who are dehydrated.
• Aliskiren: Must not be combined with perindopril in people with diabetes; should be avoided in people with kidney disease.
• Sacubitril/valsartan (Entresto): Do not take perindopril within 36 hours of switching to or from this medicine — serious angioedema risk.
• mTOR inhibitors (e.g., temsirolimus): May increase the risk of angioedema.

This is not a complete list of interactions. Always talk with your doctor or pharmacist before starting, stopping, or changing any medication.

• Do not take perindopril if you have ever had angioedema (severe swelling) caused by an ACE inhibitor, or if you have hereditary or idiopathic angioedema.
• Do not take perindopril if you are pregnant or become pregnant — it can severely harm or kill the baby.
• Tell your doctor if you are breastfeeding — it is not known whether perindopril passes into human breast milk.
• Perindopril has not been shown to be safe or effective in children.
• Older adults (especially over 70) have higher drug levels in their blood and a greater risk of dizziness and falls — start low and increase slowly.
• Tell your doctor if you have kidney disease — dose adjustment is needed, and the drug is not recommended if kidney function is severely impaired.
• Tell your doctor if you have liver disease — the active form of the medicine accumulates more in people with liver problems.
• Tell your doctor if you have diabetes, collagen vascular disease (such as lupus or scleroderma), or are about to have surgery or anesthesia, as these situations require extra monitoring or precaution.

Taking too much perindopril is most likely to cause a dangerous drop in blood pressure (hypotension). If an overdose is suspected, stop the medicine and seek immediate medical attention. Treatment focuses on supportive care — restoring blood pressure and correcting fluid and electrolyte imbalances. Perindopril can be partially removed by hemodialysis.

After a dose, perindopril begins blocking ACE activity in a dose-related way, with the strongest inhibition (80–90%) reached after higher doses and lasting 10 to 12 hours. At 24 hours after dosing, ACE inhibition is still around 60%. This sustained suppression helps keep blood vessels relaxed and blood pressure controlled throughout the day with once-daily dosing.

After swallowing a tablet, perindopril is absorbed quickly, with peak levels in the blood at about 1 hour. The body then converts it to its active form, perindoprilat, which peaks in the blood 3 to 7 hours after the dose. Food does not meaningfully reduce overall absorption, so the tablet can be taken with or without meals. Perindoprilat is cleared almost entirely by the kidneys, which is why dose adjustments are important for people with kidney problems. In older adults and those with reduced kidney function, the drug stays in the body longer and at higher levels, requiring careful dosing.

Store at 20° to 25°C (68° to 77°F); excursions permitted to 15° to 30°C (59° to 86°F) . Protect from moisture. Keep out of the reach of children.