Which medication is an alpha-1 blocker commonly used to relieve BPH symptoms such as weak urine stream?

Which medication is an alpha-1 blocker commonly used to relieve BPH symptoms such as weak urine stream?

• A. Bethanechol
• B. Tamsulosin
• C. Oxybutynin
• D. Finasteride

Answer: (B)

Alpha-1 blockers relieve urinary symptoms from an enlarged prostate by relaxing the smooth muscle in the prostate, bladder neck, and proximal urethra. This relaxation lowers resistance to flow, so urine can pass more easily and a weak stream improves. Tamsulosin is especially effective because it is selective for alpha-1A receptors that are abundant in the prostate and bladder neck. That targeted action provides meaningful symptom relief with fewer systemic effects like dizziness or lightheadedness compared with older, nonselective alpha-1 blockers. It often offers quicker improvement of urinary flow than medications that shrink the prostate, which take longer to work. The other drugs work in different ways and are not designed to address this specific symptom pattern: bethanechol stimulates bladder contractions, oxybutynin reduces detrusor activity for overactive bladder, and finasteride shrinks prostate tissue slowly rather than providing rapid relief of the flow problem.

Alpha-1 blockers relieve urinary symptoms from an enlarged prostate by relaxing the smooth muscle in the prostate, bladder neck, and proximal urethra. This relaxation lowers resistance to flow, so urine can pass more easily and a weak stream improves. Tamsulosin is especially effective because it is selective for alpha-1A receptors that are abundant in the prostate and bladder neck. That targeted action provides meaningful symptom relief with fewer systemic effects like dizziness or lightheadedness compared with older, nonselective alpha-1 blockers. It often offers quicker improvement of urinary flow than medications that shrink the prostate, which take longer to work. The other drugs work in different ways and are not designed to address this specific symptom pattern: bethanechol stimulates bladder contractions, oxybutynin reduces detrusor activity for overactive bladder, and finasteride shrinks prostate tissue slowly rather than providing rapid relief of the flow problem.