Olmesartan vs. Ramipril

See how Olmesartan and Ramipril compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Olmesartan is an ARB taken once daily for hypertension, while ramipril is an ACE inhibitor used for high blood pressure and certain heart conditions.

  • Ramipril's most common side effect is a dry cough, an ACE inhibitor class effect that olmesartan, an ARB, is far less likely to cause.

  • Ramipril has extra FDA approvals for heart failure after a heart attack and for lowering cardiovascular risk in high-risk patients, uses olmesartan does not have.

Olmesartan vs. Ramipril Drug Summary

Olmesartan

Olmesartan is an angiotensin II receptor blocker (ARB) used to treat high blood pressure in adults and children 6 and older. It comes as an oral tablet taken once a day, usually starting at 20 mg and increasing to 40 mg if more blood pressure control is needed. It can be used alone or added to other blood pressure medications.

Ramipril

Ramipril is an angiotensin-converting enzyme (ACE) inhibitor used to treat high blood pressure in adults. It is also approved for heart failure after a heart attack and to lower cardiovascular risk in high-risk patients, taken once daily starting at 2.5 mg and increasing as needed up to 20 mg.

Olmesartan vs. Ramipril Side Effects

Olmesartan

Most common
Dizziness (up to 3%)
Headache (>1%)
Back pain (>1%)
Diarrhea (>1%)

Ramipril

Most common
Dizziness (up to 2.2%)
Headache (up to 5.4%)
Cough (up to 7%)
Fatigue (up to 2.0%)

Olmesartan vs. Ramipril Dosage

Olmesartan

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 10 mg once daily At the start
Maximum dose 40 mg once daily Week 3 onward
Dose changes 2 increases As tolerated

Ramipril

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 2.5 mg once daily At the start
Maximum dose Up to 20 mg once daily If needed
Dose changes 3 increases As tolerated

Olmesartan vs. Ramipril Indications

Olmesartan

Olmesartan is approved to treat high blood pressure in adults and in children 6 years and older. It can be used by itself or combined with other blood pressure medications. It is not recommended as the first treatment tried in patients 75 or older or in those with liver impairment.

  • Hypertension in adults

  • Hypertension in children 6 and older

  • Can be combined with other antihypertensives

  • Not first-line in patients 75+ or liver disease

Ramipril

Ramipril is approved to treat high blood pressure in adults. It is also approved for people with heart failure after a recent heart attack, and to lower the risk of heart attack, stroke, or cardiovascular death in high-risk patients 55 and older with vascular disease or diabetes. It can be combined with thiazide diuretics.

  • Hypertension in adults

  • Heart failure after a heart attack

  • Cardiovascular risk reduction in adults 55+

  • Can be combined with thiazide diuretics

Olmesartan vs. Ramipril Pros and Cons

Olmesartan

Olmesartan is an ARB with simple once-daily dosing and a low rate of dry cough compared to ACE inhibitors like ramipril. It carries a rare but distinct risk of severe, delayed-onset diarrhea, and it costs more out of pocket than many generic ACE inhibitors.

Pros

  • Once-daily dosing, and doses above 40 mg add no extra benefit

  • Approved for children as young as 6

  • Less likely to cause dry cough or angioedema than ACE inhibitors

Cons

  • Costs more than generic ramipril, roughly $115 to $205 per month without insurance

  • Not recommended as initial therapy in patients 75+ or with liver impairment

  • Rare risk of sprue-like enteropathy (severe chronic diarrhea)

Ramipril

Ramipril is an ACE inhibitor with decades of outcomes data, including proven benefits for heart failure and cardiovascular risk reduction. Its most common side effect is a dry cough, and it carries a higher risk of angioedema than ARBs like olmesartan.

Pros

  • Proven to reduce death and hospitalization after heart-attack-related heart failure

  • Additional approval to lower cardiovascular risk in high-risk patients 55+

  • Typically much cheaper than olmesartan, often $8 to $30 per month as a generic

Cons

  • Dry cough affects up to 7% of patients, a known ACE inhibitor effect

  • Higher risk of angioedema than ARBs, especially in Black patients

  • Not FDA-approved for use in children

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