Oxybutynin may control your symptoms but will not cure your condition. Continue to take oxybutynin even if you feel well. Do not stop taking oxybutynin without talking to your doctor. You may notice some improvement in your symptoms within the first 2 weeks of your treatment. However, it may take 6–8 weeks to experience the full benefit of oxybutynin. Talk to your doctor if your symptoms do. Oxybutynin, sold as under the brand names Ditropan among others, is a medication used to treat overactive bladder. It works similar to tolterodine, Darifenacin, and Solifenacin. While used for bed wetting in children, evidence to support this use is poor. It is taken by mouth or applied to the skin. Common side effects include dry mouth, constipation, dizziness, trouble sleeping, and urinary. Oxybutynin improves your ability to control your urination by relaxing the muscles in the bladder. It helps to reduce leaking of urine, feelings of needing to urinate right away, and frequent trips to the bathroom. This medication belongs to the class of drugs known as antispasmodics. Oxybutynin oral tablets are used to treat overactive bladder. The immediate-release oral tablet is available in a generic version only. The extended-release oral tablet is available as a generic. Oxybutynin extended-release tablets is also used to treat children 6 years of age and older who have an overactive bladder caused by a certain nerve disorder (eg, spina bifida). This medicine is available only with your doctor's prescription. This product is available in the following dosage forms: Tablet, Extended Release; Syrup; Tablet There is a problem with information submitted for this. Oxybutynin acts to relax the bladder by inhibiting the muscarinic action of acetylcholine on smooth muscle, and not skeletal muscle. 14 The active of oxybutynin is metabolite is N-desethyloxybutynin. It competitively inhibits the postganglionic type 1, 2 and 3 muscarinic receptors. The above actions lead to increased urine capacity in the bladder, decreasing urinary urgency and frequency. In. Oxybutynin can decrease sweating and you may be more prone to heat stroke. Drinking alcohol with this medicine can increase side effects. Oxybutynin side effects. Get emergency medical help if you have signs of an allergic reaction to oxybutynin: hives; difficult breathing; swelling of your face, lips, tongue, or throat. Stop using this medicine and call your doctor at once if you have: severe. Oxybutynin (Kentera ®) for treatment of urge incontinence and/or increased urinary frequency and urgency (August 2005) Recommended with restrictions Medicinal forms Oxybutynin chloride showed no increase of mutagenic activity when tested in Schizosaccharomyces pompholiciformis, Saccharomyces cerevisiae and Salmonella typhimurium test systems. Reproduction studies using Oxybutynin chloride in the hamster, rabbit, rat, and mouse have shown no definite evidence of impaired fertility. Pregnancy. Teratogenic Effects. Category B. Reproduction studies using. 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.