Information about Scopolamine
Propantheline is an anticholinergic agent used to treat gastrointestinal conditions associated with intestinal spasm and to decrease secretions during anesthesia.
Liver safety of Scopolamine
Propantheline has not been implicated in causing liver enzyme elevations or clinically apparent acute liver injury.
Mechanism of action of Scopolamine
Propantheline (proe pan' the leen) is a synthetic quaternary ammonium anticholinergic agent which inhibits the muscarinic actions of acetylcholine on autonomic nerve endings, decreasing respiratory and gastrointestinal secretions and intestinal motility. Propantheline has broad activity against muscarinic acetylcholine receptors, but its highly polar quaternary ammonium group makes it less likely to cross lipid membranes such as the blood brain barrier, which is believed to decrease the potential for central nervous system effects. Propantheline has been used largely to alleviate symptoms of irritable bowel syndrome, painful gastrointestinal motility disorders and acid-peptic ulcer disease.
FDA approval information for Scopolamine
Propantheline was approved for use in the United States in 1953 but is now not commonly used, having been replaced by more effective antiulcer agents.
Dosage and administration for Scopolamine
Propantheline is available in tablets of 7.5 and 15 mg in generic forms and under the brand name Pro-Banthine. The typically recommended oral dose in adults is 7.5 to 15 mg three times daily and 30 mg at bedtime. Common side effects are those of parasympathetic stimulation and include dryness of the mouth and eyes, decreased sweating, headache, visual blurring, constipation, and urinary retention. Because of its structure, propantheline is believed to be less likely than other anticholinergics to cross the blood brain barrier and cause central nervous system effects such as restlessness, confusion and hallucinations. Anticholinergic agents can precipitate acute narrow angle glaucoma and acute urinary retention.
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