Highlights for trihexyphenidyl
trihexyphenidyl Side Effects
Side effects that you should report to your doctor or health care professional as soon as possible:
- allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
- changes in vision
- fast or irregular heartbeat
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
- anxiety or nervousness
trihexyphenidyl May Interact with Other Medications
- drugs for bladder problems
- drugs for breathing problems like ipratropium and tiotropium
- drugs for certain stomach or intestine problems like propantheline, homatropine methylbromide, glycopyrrolate, atropine, belladonna, and dicyclomine
How to Use trihexyphenidyl
Take this medicine by mouth with a full glass of water. Follow the directions on the prescription label. Take your medicine at regular intervals. Do not take your medicine more often than directed. Do not suddenly stop taking your medicine because you may develop a severe reaction.
Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.
Patients over 65 years old may have a stronger reaction and need a smaller dose.
They need to know if you have any of these conditions:
- heart disease
- high blood pressure
- kidney disease
- liver disease
- prostate problems
- an unusual or allergic reaction to trihexyphenidyl, other medicines, lactose, foods, dyes, or preservatives
- pregnant or trying to get pregnant
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.
Your doctor or health care professional may want you to have eye exams while you are taking this medicine.
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.
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. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.
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.
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Last Updated: September 3, 2009