GENERIC NAME: oxybutynin
BRAND NAME: Ditropan (discontinued brand in the US); Ditropan XL; Oxytrol; Anturol; Gelnique
DRUG CLASS AND MECHANISM: Oxybutynin is an oral drug that is used for treating urinary bladder spasm. Oxybutynin has a dual mechanism of action. Contraction of the smooth muscle of the bladder is stimulated by the release of acetylcholine by the nerves within the bladder and the attachment of the acetylcholine to receptors on the surface of the bladder's muscle cells. Oxybutynin suppresses involuntary contractions of the bladder's smooth muscle (spasms) by blocking the release of acetylcholine. This is referred to as an "anticholinergic effect." Oxybutynin also directly relaxes the bladder's outer layer of muscle (the detrusor muscle). The FDA approved oxybutynin in July 1975.
PREPARATIONS: Tablets (immediate release): 5 mg; Tablets (extended release): 5, 10, and 15 mg; Transdermal delivery system or patch: 3.9 mg/day; Syrup: 5 mg/5 ml. Transdermal Gel: 3% or 10%.
STORAGE: Oxybutynin should be stored at room temperature, 15 C to 30 C (59 F to 86 F). It should be kept out of the reach of children.
PRESCRIBED FOR: Oxybutynin is used for adults with symptoms of overactive bladder such as sudden urges to urinate (urgency), urinary incontinence (the inability to control urination), and frequent urination. It also is used in children, aged 6 years and older, with symptoms of detrusor muscle hyperactivity associated with neurological conditions, such as spina bifida.
- The usual dose of immediate-release oxybutynin is 5 mg 2 to 3 times daily. Elderly patients sometimes start with a lower dose of 2.5 mg.
- The recommended dose using extended-release tablets is 5 to 10 mg once daily not to exceed 30 mg daily. The oral forms can be taken with or without food. The extended release tablets must not be chewed, crushed, or broken. The tablet shell is not absorbed and is eliminated in the feces.
- The patch is applied twice weekly (every 3 to 4 days). The patch should be applied to dry, intact skin on the abdomen, hip, or buttock. A different application site should be used with each new patch, avoiding re-application to the same site within 7 days.
- One sachet of the 10% gel or three pumps of the 3% gel should be applied to intact skin of the abdomen, upper arm, shoulder or thighs. Application sites should be rotated. Patients should wash hands immediately after applying the gel in order to avoid transferring oxybutynin to other parts of the body or other individuals.
Quick GuideUrinary Incontinence: Symptoms, Causes, Treatment
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