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Hyoscyamine

Generic Name: hyoscyamine (hye oh SYE a meen)
Brand Name: Anaspaz, Ed Spaz, Hyosyne, Levbid, Levsin, NuLev, Symax SR, ...show all 27 brand names

Medically reviewed by Drugs.com on Nov 20, 2018 – Written by Cerner Multum

What is hyoscyamine?

Hyoscyamine is used to treat many different stomach and intestinal disorders, including peptic ulcer and irritable bowel syndrome. It is also used to control muscle spasms in the bladder, kidneys, or digestive tract, and to reduce stomach acid.

Hyoscyamine is sometimes used to reduce tremors and rigid muscles in people with symptoms of Parkinson's disease.

Hyoscyamine is also used as a drying agent to control excessive salivation, runny nose, or excessive sweating.

Hyoscyamine may also be used for purposes not listed in this medication guide.

Important Information

You should not use hyoscyamine if you have urination problems, a stomach or bowel obstruction, severe ulcerative colitis, glaucoma, or myasthenia gravis.

Before taking this medicine

You should not use hyoscyamine if you are allergic to it, or if you have:

  • a bladder obstruction or other urination problems;

  • an enlarged prostate;

  • a stomach or bowel obstruction (including paralytic ileus);

  • severe ulcerative colitis, or toxic megacolon;

  • glaucoma; or

  • myasthenia gravis.

Hyoscyamine is not approved for use by anyone younger than 2 years old.

Tell your doctor if you have ever had:

It is not known whether this medicine will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

It may not be safe to breast-feed while using this medicine. Ask your doctor about any risk.

How should I take hyoscyamine?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Always follow directions on the medicine label about giving hyoscyamine to a child.

Swallow an extended-release tablet whole and do not crush, chew, or break it.

Measure liquid medicine carefully. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).

Remove an orally disintegrating tablet from the package only when you are ready to take the medicine. Place the tablet on your tongue and allow it to dissolve. Swallow several times as the tablet dissolves. You may drink water after the pill has completely dissolved.

Store at room temperature away from moisture and heat.

What happens if I miss a dose?

Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include headache, dizziness, dry mouth, trouble swallowing, nausea, vomiting, blurred vision, hot dry skin, and feeling restless or nervous.

What should I avoid while taking hyoscyamine?

Avoid taking antacids at the same time you take hyoscyamine. Antacids can make it harder for your body to absorb hyoscyamine. If you use an antacid, take it after you have taken hyoscyamine and eaten a meal.

Drinking alcohol with hyoscyamine can cause side effects.

Avoid becoming overheated or dehydrated during exercise and in hot weather. Hyoscyamine can decrease sweating and you may be more prone to heat stroke.

Avoid driving or hazardous activity until you know how this medicine will affect you. Your reactions could be impaired.

Hyoscyamine side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using hyoscyamine and call your doctor at once if you have:

  • anxiety, confusion, hallucinations, unusual thoughts or behavior;

  • weakness, memory problems;

  • slurred speech;

  • problems with balance or muscle movement;

  • diarrhea; o

  • pounding heartbeats or fluttering in your chest.

Common side effects may include:

  • dizziness, drowsiness, feeling weak or tired;

  • decreased sweating, decreased urination;

  • blurred vision;

  • rash;

  • dry mouth, decreased sense of taste;

  • stomach pain, nausea, vomiting, bloating;

  • diarrhea, constipation;

  • headache;

  • sleep problems (insomnia); or

  • impotence, loss of interest in sex, or trouble having an orgasm.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What other drugs will affect hyoscyamine?

Tell your doctor about all your other medicines, especially:

This list is not complete. Other drugs may affect hyoscyamine, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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