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Hyoscyamine sulfate is an anticholinergic and antispasmodic belladonna alkaloid. A current 0.125 mg oral tablet listing on DailyMed describes use for gastrointestinal and urinary tract spasm and related symptoms. That current tablet listing is classified as an unapproved drug and does not have FDA approval.
read more about hyoscyamine ...Hyoscyamine blocks the actions of acetylcholine at peripheral cholinergic receptors in smooth muscle, cardiac tissue, and exocrine glands. This reduces gastrointestinal motility, gastric secretion, and other secretions and relaxes selected smooth muscle.
Current unapproved tablet labeling describes adjunctive use for peptic ulcer, irritable bowel syndrome, functional gastrointestinal disorders, cystitis, pylorospasm, abdominal cramps, and symptomatic biliary or renal colic. It also describes use as a drying agent for acute rhinitis symptoms.
A current 0.125 mg tablet label directs adults and adolescents age 12 and older to take one or two tablets three or four times daily, 30 minutes to one hour before meals and at bedtime. Dosing can increase to every four hours as needed, with no more than 12 tablets in 24 hours.
Anticholinergic effects include dry mouth, blurred vision, constipation, urinary retention, rapid heart rate, dizziness, and reduced sweating. Heat prostration can occur in high temperatures. Contraindications in current labeling include glaucoma, obstructive urinary or gastrointestinal disease, paralytic ileus, severe ulcerative colitis, toxic megacolon, myasthenia gravis, and myocardial ischemia.
Hyoscyamine is an anticholinergic and antispasmodic belladonna alkaloid.
No. The current DailyMed tablet listing used here is classified as an unapproved drug and states that the product does not have FDA approval.
The current tablet listing used here contains 0.125 mg of hyoscyamine sulfate.
Yes. Reduced sweating can increase the risk of overheating and heat prostration.
DailyMed - HYOSCYAMINE SULFATE TAB (hyoscyamine sulfate) tablet. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=c1c89510-6381-466f-be1a-6b104a335b56. Date Accessed October 1, 2026.
Hyoscyamine. LiverTox. https://www.ncbi.nlm.nih.gov/books/NBK548870/. Date Accessed October 1, 2026.
Hyoscyamine. MedlinePlus. https://www.medlineplus.gov/druginfo/meds/a684010.html. Date Accessed October 1, 2026.
Hyoscyamine. PubChem. https://pubchem.ncbi.nlm.nih.gov/compound/Hyoscyamine. Date Accessed October 1, 2026.
Hyoscyamine Sulfate. PubChem. https://pubchem.ncbi.nlm.nih.gov/compound/Hyoscyamine-Sulfate. Date Accessed October 1, 2026.