What medication is indicated for urge incontinence due to detrusor overactivity?

Oxybutynin is indicated for urge incontinence due to detrusor overactivity because it works as an anticholinergic agent. The medication helps to relax the bladder muscle, which reduces involuntary contractions of the detrusor muscle. These contractions can lead to the sudden and urgent need to urinate, characteristic of urge incontinence. By inhibiting the action of acetylcholine on the muscarinic receptors in the bladder, oxybutynin helps to increase bladder capacity and decrease the frequency of urinary urgency and incontinence episodes.

Intravaginal estrogen cream is primarily used to treat vaginal atrophy in postmenopausal women and does not directly address bladder overactivity. Terazosin is an alpha-blocker that is more commonly used for urinary symptoms related to benign prostatic hyperplasia (BPH), focusing on improving urine flow rather than addressing detrusor overactivity. Intravaginal miconazole cream is an antifungal medication used for yeast infections and does not have any relevance in the treatment of urge incontinence. Thus, oxybutynin is the most appropriate choice for managing this specific condition.