Bethanechol 25mg Price in Karachi – Urinary Retention Treatment Tablets Bethanechol 25mg in Karachi is a trusted prescription medication used to treat urinary retention (difficulty urinating) that occurs after surgery, childbirth, or due to bladder dysfunction. Containing Bethanechol Chloride as the active ingredient, this medicine works by stimulating bladder muscle contractions, helping to restore normal urination.