What Is Oxybutynin Chloride?

Oxybutynin, or oxybutynin chloride, is a prescription drug used to treat frequent urination and spasms. It can also reduce sweating.

Origin

• According to the Drug Bank website, the patent for synthesis of oxybutynin chloride went to Mead Johnson in 1963 (British patent 940540).

Chemistry

• The chemical formula for oxybutynin chloride is C22H31NO3. The chemical contains carbon, hydrogen, nitrogen and oxygen. It appears as a white crystalline powder (solid).

Function

• The main muscle in the bladder, the detrusor muscle, can spasm, causing frequent urination or the sensation of such. Oxybutynin chloride relaxes the muscle by blocking nerve receptors (cholinergic receptors) on the muscle itself, so the muscle does not "know" to contract.

Drugs

• Oxybutynin chloride is given in pills (Ditropan and Lyrinel XL), as a patch (Oxytrol), in a liquid medicine, and as a gel ointment (Gelnique). It is also available in generic form.

Warning

• Oxybutynin chloride can have side effects which include dry mouth, constipation and dizziness. It may also cause calcium deficiency. It should always be taken as directed by the physician.