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Hyoscyamine

Brand names: Levsin, Levbid, Oscimin

Hyoscyamine relaxes the gut and bladder muscles to ease cramping from IBS and bladder spasms.

Brand namesLevsin, Levbid, Oscimin
Type of medicineAntispasmodic (anticholinergic)
Prescription?Prescription
ImportantThis page is general information, not a prescription. Don't start, stop, or change a medicine without talking to your provider or pharmacist.

Overview

It's anticholinergic, so dry mouth and constipation are common.

What it's used for

  • IBS and gut cramping
  • Bladder spasms
  • Drying secretions before surgery

How to take it

  • Take it before meals or as needed, as prescribed. Under-the-tongue forms work faster.

Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.

Side effects

Common side effects

  • Dry mouth
  • Blurry vision
  • Constipation
  • Less sweating
Call your provider todayCan't pee
Call your provider todayConfusion or fast heartbeat
Call your provider todayOverheating in hot weather

Warnings

  • Not for people with glaucoma, blocked bowels, or urinary retention.

Other medicines, foods, and alcohol

  • Other anticholinergic medicines add to side effects.
  • Antacids lower absorption.

Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.

Pregnancy and breastfeeding

Talk with your provider.

Missed doses, overdose, and storage

If you miss a dose

Take it as soon as you remember, unless it's almost time for your next dose. Then skip the missed dose. Don't take two doses at once.

If someone takes too much

Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.

Storing it

Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.

Conditions it's used for

Sources

Last updated 2026-11-13.