hyoscyamine (generic name)

Cystospaz (brand name)

It is used to treat stomach and bladder problems
(hye oh SYE a meen)
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What is this medicine?

HYOSCYAMINE (hye oh SYE a meen) is used to treat stomach and bladder problems. This medicine is used to treat infants with colic.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:
  • glaucoma
  • heart disease or previous heart attack
  • myasthenia gravis
  • prostate trouble
  • stomach obstruction
  • trouble passing urine
  • ulcerative colitis
  • an unusual or allergic reaction to hyoscyamine, other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding

How should I use this medicine?

Take this medicine by mouth. Follow the directions on the prescription label. Use a specially marked spoon or dropper to measure each dose. Ask your pharmacist if you do not have one. Household spoons are not accurate. Take your medicine at regular intervals. Do not take it more often than directed.

Talk to your pediatrician regarding the use of this medicine in children. While this drug may be prescribed for selected conditions, precautions do apply.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What may interact with this medicine?

  • amantadine
  • antacids
  • benztropine
  • donepezil
  • galantamine
  • medicines for depression, anxiety, or psychotic disturbances
  • medicines for hay fever and other allergies
  • rivastigmine
  • tacrine

What should I watch for while using this medicine?

You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. To reduce the risk of dizzy or fainting spells, do not sit or stand up quickly, especially if you are an older patient. Alcohol can make you more dizzy. Avoid alcoholic drinks.

Your mouth may get dry. Chewing sugarless gum or sucking hard candy, and drinking plenty of water may help. Contact your doctor if the problem does not go away or is severe.

This medicine may cause dry eyes and blurred vision. If you wear contact lenses you may feel some discomfort. Lubricating drops may help. See your eye doctor if the problem does not go away or is severe.

Stay out of bright light and wear sunglasses if this medicine makes your eyes more sensitive to light.

Avoid extreme heat (e.g., hot tubs, saunas). This medicine can cause you to sweat less than normal. Your body temperature could increase to dangerous levels, which may lead to heat stroke.

What side effects may I notice from receiving this medicine?

Side effects that you should report to your doctor or health care professional as soon as possible:
  • anxiety or nervousness
  • confusion
  • dizziness
  • feeling faint or lightheaded, falls
  • fast, irregular heartbeat
  • fever
  • trouble passing urine or change in the amount of urine
  • unusually weak or tired
  • vomiting

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

  • altered taste
  • constipation
  • nausea

Where should I keep my medicine?

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Throw away any unused medicine after the expiration date.

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.

Last Updated: May 04, 2009
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