Tamsulosin Oral : Uses, Side Effects, Interactions, Warnings

Brand Names: Flomax
Therapeutic Category: Alpha 1 Blocker
Dosage Forms: Tablet, Oral
Use: Labeled Indications: Benign prostatic hyperplasia
Off Label: Chronic prostatitis/chronic pelvic pain syndrome in males, Lower urinary tract symptoms (LUTS) in males, Ureteral calculi expulsion, Ureteral stent-related urinary symptoms
Dosing : Adult : Tamsulosin capsules should be administered 30 minutes following the same meal each day
Benign prostatic hyperplasia (BPH): Oral: Capsule: Initial and Maintenance: 0.4 mg once daily. If response is inadequate after 2 to 4 weeks, may increase to 0.8 mg once daily. If therapy discontinued or interrupted for several days, restart with 0.4 mg once daily

Dose Adjustments
Renal Impairment: no dosage adjustments
Hepatic Impairment: no dosage adjustments
Adverse Drug Interaction:
Orthostatic hypotension, Headache, dizziness, Ejaculation failure, Rhinitis

Important Notes:
Angina: Discontinue if symptoms of angina occur or worsen.
May cause significant orthostatic hypotension and syncope, especially with first dose, anticipate a similar effect if therapy interrupted for a few days, if dosage is rapidly increased, or if another antihypertensive drug (particularly vasodilators) or a PDE-5 inhibitor (eg, sildenafil, tadalafil, vardenafil) introduced.
Pregnancy & Lactation: Pregnancy risk factor B / not known if present in breast milk
Medication Safety issue:
- Flomax confused with Flonase, Flovent, Foltx, Fosamax
- Tamsulosin confused with tacrolimus, tamoxifen, terazosin