valethamate bromide

Valethamate bromide ( sold under many brand names such as Epidosin, Dilaton, Valosin, Valamate, Osdil etc), a quarternary ammonium agent, has been used in augmentation of labor. Valethamate has antimuscarinic action and blocks cholinergic receptors in the ganglia. This action along with the direct action on the smooth muscles of the cervix is thought to help cervical dilatation during labor. Since it is not selective, it exerts anticholinergic side effects such as tachycardia, flushing, cotton mouth and photophobia due to mydriasis. Common side effects are palpitations, increased heart rate, arrhythmia, excessive thirst, reduced bronchial secretions, dry mouth, Photophobia, dry skin, loss of accommodation, slow heart rate, flushing. — NCATS