Olmesartan 20 mg is a common tablet strength of olmesartan medoxomil, an angiotensin II receptor blocker (ARB) used to treat high blood pressure (hypertension). Brand name example: Benicar.
What 20 mg means and how it’s used
- Usual adult starting dose for hypertension: 20 mg taken once daily.
- If needed, the dose can be increased to 40 mg once daily (maximum recommended dose for hypertension).
- Taken once daily, with or without food. Do not split or crush the tablet unless your doctor says it’s OK.
- Some people (older adults or those with kidney/hepatic issues) may need a lower starting dose or closer monitoring.
What to expect
- It lowers blood pressure by relaxing blood vessels.
- May cause dizziness or lightheadedness, especially after first dose or with fast changes in position.
- Serious side effects are less common but can include:
- Hyperkalemia (high potassium): symptoms like swelling, weakness, or palpitations.
- Very low blood pressure (hypotension): fainting, dizziness, or blurried vision.
- Rare: kidney problems, allergic reactions.
Common (less serious) side effects: dizziness, headache, fatigue, nausea.
Precautions and interactions
- Pregnancy: Do not use if you are pregnant; ARBs can harm the fetus. If you become pregnant, stop the medication and contact your clinician.
- Kidney or liver disease: Dose adjustments or closer monitoring may be needed.
- Interactions to watch for:
- Other blood pressure medicines, diuretics, or potassium supplements/salt substitutes with potassium.
- NSAIDs (ibuprofen, naproxen, etc.) can reduce blood pressure-lowering effect or affect kidney function.
- Lithium or certain other drugs can increase risk of adverse effects; tell your doctor about all meds you take.
- Regular monitoring: blood pressure, kidney function, and electrolytes (potassium) as advised by your clinician.
If you’re taking 20 mg or considering starting it
- Take exactly as prescribed. Don’t change the dose or frequency without talking to your doctor.
- If you miss a dose, take it as soon as you remember unless it’s almost time for the next dose. Do not double up.
- Seek medical advice if you experience severe dizziness, fainting, swelling of face/tongue/lips, chest pain, or signs of possible an allergic reaction.
If you’d like, tell me:
- Are you asking about starting olmesartan 20 mg, or you want details on a specific aspect (side effects, interactions, dosing for you or a loved one, pregnancy considerations, etc.)?