Urimax (Tamsulosin Hydrochloride)
Also sold as: Urimax, Flomax, Veltam, Contiflo, Tamsin
Pregnancy
Cat N/A
Lactation
Unknown
Schedule
H
Forms
Capsule/Tablet MR 0.2mg, 0.4mg
Indications
- Benign prostatic hyperplasia (BPH) — lower urinary tract symptoms (LUTS)
- Ureteric colic / ureterolithiasis (medical expulsive therapy — off-label)
Adult Dosing
BPH / LUTS
0.4 mg PO once daily after the same meal each day
Ongoing — lifelong for BPH symptom control
Ureteric colic (expulsive therapy)
0.4 mg PO once daily
4 weeks or until stone passes
Pediatric Dosing
No paediatric indication
Renal Dose Adjustment
| CrCl / eGFR | Dose Adjustment |
|---|---|
| CrCl > 10 mL/min | No adjustment |
| CrCl < 10 mL/min | Use with caution — no data |
Hepatic Adjustment
Avoid in severe hepatic impairment
Pregnancy & Lactation
Pregnancy: Category N/A
Male medication — not applicable to pregnancy
Lactation: Unknown
Male medication — not applicable
Top Drug Interactions
| Interacting Drug | Effect | Severity |
|---|---|---|
| Other alpha-blockers (doxazosin, prazosin) | Additive hypotension — avoid combination | Major |
| PDE-5 inhibitors (sildenafil, tadalafil) | Significant additive hypotension — use 0.4 mg tamsulosin only; use lowest PDE-5 dose | Major |
| CYP3A4 inhibitors (ketoconazole, clarithromycin, ritonavir) | Increase tamsulosin levels — hypotension | Moderate |
| Antihypertensives | Additive hypotension | Moderate |
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Side Effects
Common
- Dizziness (orthostatic hypotension — especially first dose)
- Ejaculatory dysfunction (retrograde ejaculation — common, reversible on stopping)
- Headache
- Rhinitis
- Asthenia
Serious / Discontinue If
- First-dose hypotension / syncope (less than non-selective alpha-blockers but possible)
- Intraoperative floppy iris syndrome (IFIS) — inform ophthalmologist before cataract surgery
- Priapism (rare)
Contraindications
- Orthostatichypotension
- Severe hepatic impairment
- Concurrent strong CYP3A4 + P-gp inhibitors
Available Indian Brands
| Brand | Manufacturer | Price (approx) |
|---|---|---|
| Urimax 0.4mg | Cipla | 15 cap ₹145 |
| Veltam 0.4mg | Intas | 15 cap ₹125 |
| Contiflo OD 0.4mg | Ranbaxy/Sun | 15 cap ₹118 |
| Tamsin 0.4mg | Torrent | 15 cap ₹115 |
Monitoring Required
- Blood pressure (orthostatic measurements)
- IPSS (International Prostate Symptom Score) for BPH response
- Post-void residual urine (if available)
- PSA (prostate-specific antigen) annually
Patient Counseling Points
- Take 30 minutes after the same meal each day — consistency reduces hypotension
- First dose: sit or lie down for 6 hours (dizziness/fainting risk)
- Rise slowly from bed — especially in the morning
- Retrograde ejaculation (semen goes backwards into bladder) — common, harmless, reversible
- ⚠️ INFORM OPHTHALMOLOGIST before cataract surgery — IFIS risk (floppy iris)
- Regular follow-up with urologist recommended
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EasyClinic auto-flags Urimax interactions, renal cutoffs, and pregnancy warnings the moment you write the prescription. Built-in safety net for every Indian doctor.
Clinically reviewed by: Dr. Rajiv Nair, MCh (Urology), Consultant Urologist
Last reviewed: 2026-04-01
References
- BNF — Tamsulosin
- EAU BPH Guidelines 2023
- EAU Urolithiasis Guidelines 2023
- IFIS Review — Ophthalmology 2020