Tamsulosin with solifenacin

How it works

Tamsulosin relaxes prostatic and bladder-neck smooth muscle through selective alpha-1A adrenoceptor blockade to ease voiding, while solifenacin blocks detrusor M3 muscarinic receptors to reduce urgency and frequency.

Prescribing in practice

• The antimuscarinic component risks acute urinary retention, so it should be avoided where there is a significant post-void residual or high obstruction risk, and patients warned to report inability to void.
• Combined effects include postural hypotension from tamsulosin and antimuscarinic effects (dry mouth, constipation, confusion), with caution in narrow-angle glaucoma and the elderly.
• Tell cataract surgeons about tamsulosin use because of the risk of intra-operative floppy iris syndrome.

Monitoring

Review voiding efficiency and post-void residual alongside storage-symptom response and antimuscarinic tolerability.

Counselling the patient

• Report any difficulty or inability to pass urine promptly.
• Expect possible dry mouth and dizziness on standing; mention this medicine before eye surgery.

Evidence & guidelines

Trials of combined alpha-blocker and antimuscarinic therapy show improved storage symptoms over alpha-blocker alone in selected men with low retention risk.