irbesartan vs telmisartan
PlainMeds reviewed this comparison against our methodology in August 2026. It places FDA and CMS record fields side by side, without recommending either medication.
Side-by-side comparison of irbesartan and telmisartan. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Avapro
Micardis
Irbesartan is a medicine that lowers blood pressure. It belongs to a class of drugs called angiotensin II receptor blockers (ARBs).
Telmisartan (Micardis) is a medicine that lowers blood pressure. It belongs to a class of drugs called angiotensin II receptor blockers (ARBs).
Irbesartan is used to treat high blood pressure (hypertension). Lowering blood pressure reduces the risk of strokes and heart attacks. It is also used to treat kidney problems caused by diabetes in people with high blood pressure.
Telmisartan is used to treat high blood pressure. Lowering blood pressure reduces the risk of strokes and heart attacks. It can also lower cardiovascular risk if you cannot take ACE inhibitors. Controlling high blood pressure is important for overall heart health.
Irbesartan blocks a substance in your body that tightens blood vessels. This helps blood vessels relax and widens them, which lowers blood pressure. It also helps protect the kidneys in people with diabetes.
Telmisartan blocks a substance in your body that tightens blood vessels. This helps blood vessels relax and widens them. As a result, blood pressure is lowered.
- • Diarrhea
- • Heartburn
- • Tiredness
- • Increased potassium levels
- • Dizziness
- • Back pain
- • Sinus infection
- • Diarrhea
- • Upper respiratory tract infection
- • Sore throat
- Fatigue 2,460
- Nausea 2,420
- Diarrhoea 2,261
- Acute Kidney Injury 2,054
- Dizziness 1,985
- Nausea 2,059
- Fatigue 2,001
- Diarrhoea 1,794
- Dyspnoea 1,785
- Headache 1,715
Irbesartan can harm your unborn baby. If you are pregnant or plan to become pregnant, tell your doctor right away. Stop taking irbesartan as soon as you know you are pregnant.
If you are pregnant or plan to become pregnant, stop taking this medicine right away. Telmisartan can harm or cause death to your unborn baby.
Irbesartan can cause serious harm or death to an unborn baby. Do not take this medicine if you are pregnant. Talk to your doctor if you are breastfeeding, as this medication may not be safe for your baby.
Telmisartan can cause harm to your unborn baby, especially during the second and third trimesters. Do not breastfeed while taking telmisartan.
Also Compare, Nearby Drugs
Compare irbesartan with
Compare telmisartan with
How to Read This irbesartan vs telmisartan Comparison
irbesartan is classified in the Angiotensin II Receptor Blocker (ARB) drug class, while telmisartan sits within the Angiotensin II Receptor Blocker (ARB) class. Because both drugs share the same classification, they are often considered interchangeable in theory, but clinical outcomes rarely track that cleanly. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, irbesartan has 11,180 submissions while telmisartan has 9,354. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for irbesartan or telmisartan.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.