Myotonine, also known by its generic name bethanechol chloride, is a medication primarily used to treat urinary retention without obstruction, as well as various disorders related to bladder muscle function. It falls under the category of cholinergic agonists, which means it mimics the action of acetylcholine, a neurotransmitter involved in stimulating muscle contractions. By activating muscarinic receptors, Myotonine encourages the bladder to contract, facilitating urination in patients who have difficulty initiating the process due to muscle weakness or lack of nerve stimulation. It may also be used in certain cases to treat gastrointestinal motility disorders, helping to stimulate movement within the digestive tract. Myotonine is typically administered orally, but it can also be given subcutaneously in some clinical settings.