Please check your internet connection and try again.
# Tamsulosin
## Overview
Tamsulosin is an alpha-1 adrenergic receptor antagonist.
## Primary Indications
* Benign prostatic hyperplasia (BPH) - to improve urinary flow.
* Ureteral stones (off-label) - to facilitate stone expulsion.
## Adult Dosing
* **BPH:** 0.4 mg orally once daily. If inadequate response after 2-4 weeks, may increase to 0.8 mg orally once daily.
* **Ureteral Stones (off-label):** 0.4 mg to 0.8 mg orally once daily. Dosing duration is typically 4-6 weeks or until stone passage.
## Pediatric Dosing
Tamsulosin is **not indicated** for use in pediatric patients.
## Dose Adjustments
No specific dose adjustments are required for patients with renal or hepatic impairment, however, caution is advised.
## Contraindications
* Hypersensitivity to tamsulosin or any component of the formulation.
* History of angioedema due to tamsulosin.
## Adverse Effects
Common adverse effects include dizziness, headache, abnormal ejaculation (e.g., ejaculatory dysfunction, decreased volume), rhinitis, and orthostatic hypotension.
## Key Drug Interactions
* **CYP3A4 Inhibitors (e.g., ketoconazole, ritonavir):** May increase tamsulosin plasma concentrations, potentially increasing the risk of adverse effects.
* **CYP2D6 Inhibitors (e.g., paroxetine):** May increase tamsulosin plasma concentrations.
* **Strong Alpha-1 Antagonists (e.g., prazosin, terazosin):** Concomitant use is not recommended due to potential for additive hypotensive effects.
## Monitoring
* Monitor for symptoms of BPH relief.
* Monitor for signs and symptoms of orthostatic hypotension (e.g., dizziness upon standing).
* Rarely, monitor for signs of angioedema.
## Clinical Pearls
* Tamsulosin can cause a significant drop in blood pressure, especially orthostatic hypotension. Advise patients to stand up slowly from a sitting or lying position.
* In patients undergoing cataract surgery, tamsulosin has been associated with Intraoperative Floppy Iris Syndrome (IFIS). Inform ophthalmologists of tamsulosin use before surgery.
* Take tamsulosin at the same time each day, preferably in the morning. Capsules should be swallowed whole and not chewed, cut, or crushed.
---
**Disclaimer:** This information is intended for clinical use and does not replace professional medical judgment. Always consult the most current prescribing information and institutional protocols before initiating or adjusting therapy.
