Tamsulosin — Drug Interactions, Alcohol & Pregnancy Guide
Last reviewed: · Source: US FDA drug label database · 247CanITakeWith Editorial Team
- Tamsulosin is a Alpha-1 blocker used for Benign prostatic hyperplasia (BPH).
- Alcohol: Alcohol and tamsulosin both lower blood pressure and can cause dizziness on standing — keep drinking moderate and rise slowly.
- This page covers 1 specific drug combination with Tamsulosin.
About Tamsulosin
Tamsulosin relaxes smooth muscle in the prostate and bladder neck to improve urine flow in men with BPH. Can cause postural hypotension (dizziness on standing) — take at bedtime. May cause intraoperative floppy iris syndrome in cataract surgery.
Also sold as: Flomax, Contiflo
Tamsulosin at a glance
Tamsulosin is classed as alpha-1 blocker and is used for benign prostatic hyperplasia (bph), kidney stones (off-label). It is a prescription medicine, so doses and combinations should always be agreed with your prescriber or pharmacist.
Typical adult dosing guidance: 400mcg (0.4mg) once daily after meals. Your own label or prescription always takes priority over general figures.
Interactions most often flagged
- Alcohol
- Sildenafil
- Other alpha-blockers
Before you combine Tamsulosin with anything new
- Read the patient information leaflet for both products.
- Keep one up-to-date list of every medicine and supplement you take.
- Ask a pharmacist — it is free and takes a couple of minutes.
- Seek urgent medical help if you feel seriously unwell after combining medicines.
Tamsulosin and Alcohol
Alcohol and tamsulosin both lower blood pressure and can cause dizziness on standing — keep drinking moderate and rise slowly.
Full guide →Tamsulosin — Drug Combinations
More in this category: urology
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Frequently Asked Questions
What is Tamsulosin used for?
Tamsulosin is a Alpha-1 blocker used for Benign prostatic hyperplasia (BPH), Kidney stones (off-label).
What is the maximum adult dose of Tamsulosin?
The maximum adult dose is 400mcg (0.4mg) once daily after meals. This is general guidance — always follow the dose on your prescription or product label, and check with a pharmacist if you're unsure.
Can I drink alcohol with Tamsulosin?
Alcohol and tamsulosin both lower blood pressure and can cause dizziness on standing — keep drinking moderate and rise slowly.
Is Tamsulosin available over the counter in the UK?
Tamsulosin is prescription-only in the UK.
What should I check before taking Tamsulosin with other medicines?
The interactions most often flagged for Tamsulosin are: alcohol, sildenafil, other alpha-blockers. Tell your pharmacist or prescriber about everything you take, including over-the-counter products, supplements and herbal remedies, before combining it with anything new.
What are the brand names for Tamsulosin?
Tamsulosin is sold under brand names including Flomax, Contiflo. The active ingredient is the same, so check labels carefully to avoid doubling up on it.
Do I need a prescription for Tamsulosin?
Tamsulosin is a prescription medicine, so take it exactly as your prescriber directed and ask them before changing the dose.
Not sure if Tamsulosin is safe with your other medications?
HealthLabs.com lets you check liver enzyme or kidney function levels before combining medications long-term — no GP referral needed.
Check your levels at HealthLabs →Always speak to your pharmacist or GP for personalised medical advice. Affiliate link — we may earn a commission.