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tamsulosin (Hanmi Tams / tamsulosin, Hanmi / HIP 1402)

✓ Approved

Hanmi Pharmaceutical · ADRA1A · Small Molecule

What is tamsulosin?

tamsulosin is a small molecule developed by Hanmi Pharmaceutical. It is approved for therapeutic indications via oral (po).

Drug Profile

Brand NamesHanmi Tams, tamsulosin, Hanmi, HIP 1402
CompanyHanmi Pharmaceutical
Drug ClassSmall Molecule
Molecular TargetADRA1A
RouteOral (PO)
StatusApproved

Mechanism of Action

Molecular Targets

tamsulosin acts on 1 molecular target:

ADRA1Aadrenoceptor alpha 1A (ALPHA1AAR, ADRA1C)
Want deeper analysis?Noah AI can explain complex mechanisms and compare to similar drugs.

Therapeutic Indications

tamsulosin is developed for 1 unique indication across 1 therapeutic area.

Therapeutic AreaConditionPhase
Reproductive system and breast disordersBenign prostatic hyperplasia✓ Approved

Related Research Articles

PubMedUrologia internationalis2026-10-20

Efficacy of cetirizine, tamsulosin and their combination as medical expulsive therapy for distal ureteral stones: a prospective randomized study.

Hasan Ahmed Mahmoud AM, Ahmed Amr Alameldeen AA, Sayed Reham Farouk RF, AbdelRazek Mostafa M

Background The management of ureteral stones, particularly those measuring less than 10 mm, has garnered considerable attention in urological research, with the goal of enhancing non-invasive treatment methods. Medical expulsive therapy is notable for its low invasiveness and cost. To assess the efficacy and safety of tamsulosin alone, cetirizine alone, as well as their combination in treating distal ureteric stones sized 5-10 mm. Between March 2021 and March 2024, patients presented with lower ureteral stones 5-10 mm were randomly assigned to four groups: group A (121 patients) took tamsulosin 0.4 mg; group B (120 patients) took cetirizine 5 mg; group C (119 patients) took a combination of tamsulosin 0.4 mg and cetirizine 5 mg; and group D (120 patients) received analgesics on demand as a control group. We evaluated stone passage rates, time required for stone expulsion, total analgesic dosage, and any recorded side effects. All outcomes were recorded and analyzed accordingly. Group C exhibited the highest rate of stone expulsion among all groups (85.8% vs. 67%, 55%, and 25% in groups A, B, and D respectively, p = 0.0001). Group C had a substantially shorter time required for stone expulsion in comparison with groups A, B, and D (13.15 ± 5.3 days vs. 14.95 ± 6.95, 17.57 ± 6.21, and 20.94 ± 5.58 days respectively, p < 0.0001). A statistically significant reduction in the total analgesic requirements was demonstrated in group C (p < 0.0001). Except for retrograde ejaculation which was evident in groups A and C (40 %, 37.7 % respectively versus 0% in the other groups, p < 0.0001), no substantial variations regarding the side effects were observed among the groups. Combined therapy with tamsulosin and cetirizine significantly improves stone expulsion rate, shortens expulsion time, and reduces analgesic requirements compared with either therapy alone.

PubMedIndian journal of orthopaedics2026-10-19

Author's Response to "Letter to the Editor: Sex Imbalance and the Interpretation of Tamsulosin Efficacy in Hip Fracture Surgery".

Tripathy Sujit Kumar SK, Varghese Paulson P, Khan Shahnawaz S, Patel Ranjan Kumar RK et al.

Postoperative urinary retention (POUR) is a clinically relevant complication following hip-fracture surgery. In response to concerns regarding the marked sex imbalance between treatment groups in the TamPOUR-Hip randomized trial, we further examined the influence of sex on the observed treatment effect of perioperative tamsulosin. Although the crude incidence of POUR was lower in the tamsulosin group than in the placebo group (16.7% vs 33.3%), adjustment for potential confounders demonstrated no independent protective effect of tamsulosin (adjusted odds ratio 0.99, 95% confidence interval 0.16-5.82; P = 0.990). Female sex emerged as a strong independent predictor of POUR. Overall, POUR occurred in 24 of 54 women (44.4%) compared with 6 of 66 men (9.1%), while sex-stratified analyses showed no significant treatment effect within either subgroup. Previous studies have similarly reported a relatively high incidence of urinary retention among women undergoing hip-fracture surgery. These findings indicate that the apparent crude reduction in POUR with tamsulosin was largely influenced by unequal sex distribution rather than an independent pharmacological effect. Nevertheless, tamsulosin was associated with lower pre-void and post-void bladder volumes, suggesting improved bladder emptying. Future adequately powered trials should incorporate sex-stratified or block randomization and prespecified sex-specific analyses to better define the role of sex and tamsulosin in POUR prevention after hip-fracture surgery.

PubMedIndian journal of orthopaedics2026-10-19

Letter to the Editor: Sex Imbalance and the Interpretation of Tamsulosin Efficacy in Hip Fracture Surgery.

Sağlıcak Harun H

PubMedCureus2026-10-17

Acute Urinary Retention Leading to Post-renal Acute Kidney Injury Post-radiotherapy: A Case Report.

Bitterman Brayden B, Vaishampayan Nitin N, Hart Kimberly B KB, Boggula Ramesh R et al.

A man in his 70s with high-risk localized prostate adenocarcinoma underwent definitive external beam radiotherapy (EBRT) to the prostate and pelvis with concurrent androgen deprivation therapy using leuprolide. Eight days after completion of radiotherapy, he developed acute urinary retention (AUR) with overflow incontinence, constipation, and post-renal acute kidney injury (AKI), requiring hospitalization and bladder decompression with Foley catheter placement. Initial urine output was approximately 1 liter, and creatinine improved from 4.89 mg/dL to 1.46 mg/dL after decompression. Imaging demonstrated mild left hydronephrosis and chronic renal disease without an obstructing calculus. He was discharged home on tamsulosin and a bowel regimen with a Foley catheter in place. Persistent catheter dependence subsequently required transurethral resection of the prostate (TURP) with improvement in symptoms. This case report describes a case of severe acute urinary retention with post-renal acute kidney injury occurring shortly after prostate and pelvic radiotherapy. The obstruction was likely multifactorial, with radiation-associated inflammation or edema potentially aggravating the underlying outlet issues and constipation. Prompt recognition and bladder decompression may permit rapid renal recovery and are important in patients with reduced renal reserves.

PubMedBrazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas2026-10-15

Alpha1-adrenoceptor antagonists block the positive chronotropic effect of 6-nitrodopamine in the isolated rat right atrium.

Alves B L BL, Niederauer A J S AJS, Britto-Júnior J J, Sobanski J F JF et al.

6-Nitrodopamine (6-ND) released from isolated rat atria produces potent positive chronotropic actions. Direct negative chronotropic responses to some selective α1-adrenoceptor (AR) antagonists like prazosin have been reported. Since α1-AR antagonists inhibit 6-ND-induced smooth muscle contractions, we have hypothesized that negative chronotropism induced by α1-AR antagonists reflects 6-ND blockade. This study investigated whether selective α1-AR antagonists affect 6-ND-induced positive chronotropism in isolated rat atria. Alfuzosin at 10 nM did not affect the atrial rate, but at 100 nM, it significantly reduced the atrial rate. This effect was not observed in L-NAME (100 mM)-treated preparations or in atria from rats chronically treated with L-NAME. Alfuzosin (100 nM) significantly reduced the 6-ND-induced positive chronotropism without affecting the chronotropic responses to noradrenaline, adrenaline, or dopamine. Similar results were obtained with doxazosin (1-10 nM), tamsulosin (10-100 nM), and prazosin (1-10 nM). Isoprenaline induced concentration-dependent increases in atrial rate, which were not significantly affected by any of these α1-AR antagonists. The results demonstrated that α1-AR antagonists reduced atrial basal rate only at concentrations affecting the positive chronotropic effect of 6-ND, and this reduction was not observed when NO synthesis was blocked, indicating that the negative chronotropic effect may involve 6-ND receptor blockade.

PubMedIndian journal of orthopaedics2026-10-14

Efficacy and Safety of Tamsulosin in the Prevention of Postoperative Urinary Retention in Hip Fractures (TamPOUR-Hip Trial): A Randomized, Double-Blind Placebo-Controlled Study.

Tripathy Sujit Kumar SK, Varghese Paulson P, Khan Shahnawaz S, Patel Ranjan Kumar RK et al.

Postoperative urinary retention (POUR) is a common problem after hip fracture surgery in the elderly patients, leading to increased morbidity, catheterization, and prolonged hospitalization. Tamsulosin, an α1-adrenergic antagonist, may reduce POUR by decreasing bladder outlet resistance. This study evaluated the efficacy and safety of perioperative tamsulosin in preventing POUR in hip fracture patients. In this prospective, randomized, double-blind, placebo-controlled trial, 120 patients undergoing hip fracture surgery under spinal anaesthesia were allocated to receive either tamsulosin (0.4 mg daily) or placebo from admission until the second postoperative day. Foley catheter was removed on postoperative day one, and POUR was defined as post-void residual urine > 200 mL at six hours of catheter removal. Primary outcome was incidence of POUR; secondary outcomes included indwelling re-catheterization rates, urinary tract infections (UTIs), and adverse events. POUR was observed in 16.7% of patients in the tamsulosin group compared with 33.3% in the placebo group. Tamsulosin significantly reduced the pre-void bladder volume (311.3 ± 174.5 mL vs. 402.9 ± 198.4 mL; p = 0.008) and post-void residual urine volume (median 20 mL vs. 53.5 mL; p < 0.001). Re-catheterization was less frequent with tamsulosin (8.3% vs. 21.7%), though not statistically significant. Multivariate logistic regression analysis identified female sex, longer surgical duration, and blood loss as independent risk factors for POUR, while tamsulosin use was not found to be preventive. Adverse events, including dizziness and postural hypotension, were mild and self-limiting. Perioperative tamsulosin was safe and improved bladder emptying, but did not significantly reduce the incidence of POUR in elderly patients undergoing hip fracture surgery. Larger multicentric studies are needed to further clarify its role in this population.

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