Tamsulosin dosage?

Here are the typical adult dosing guidelines for tamsulosin (brand name Flomax). Dosing can vary by country and by indication, so check the prescription label or ask your doctor if you’re unsure.

- For benign prostatic hyperplasia (BPH):
- Starting dose: 0.4 mg by mouth once daily, about 30 minutes after the same meal each day.
- If needed, after 2–4 weeks, may increase to 0.8 mg once daily (maximum 0.8 mg/day).
- Take after a meal; swallow the capsule whole. Do not crush or chew.

- For ureteral stones (to help passage of stones):
- 0.4 mg once daily, typically for up to 4 weeks (or as directed by a clinician).

- Important notes:
- If you miss a dose, take it as soon as you remember, unless it’s almost time for your next dose—don’t double up.
- It can cause dizziness or fainting, especially after the first doses or when standing up quickly; rise slowly.
- Avoid driving or operating heavy machinery if you feel lightheaded.
- Tamsulosin can interact with other medicines (e.g., other alpha blockers, blood pressure medicines, and PDE-5 inhibitors). Tell your doctor about all meds you take.
- Inform your provider if you have liver or kidney problems, or if you’re planning cataract surgery (tamsulosin can affect the eye during some surgeries).

If you’re asking for a specific case (e.g., another indication, pediatric use, liver/kidney impairment, or a different country’s dosing), tell me your situation and I’ll tailor the guidance. And always follow the exact dosing your prescriber gave you. If you’re unsure or have not been prescribed tamsulosin yet, consult a healthcare professional before starting or changing any dose.