It is used to treat Parkinsons disease. It is used to treat side effects caused by some drugs used to treat schizophrenia.
It helps keep chemical balance in the brain
Take this drug with food. Drink lots of noncaffeine liquids unless told to drink less liquid by your doctor. There is a liquid (elixir) if you cannot swallow pills. Those who have feeding tubes may also use the liquid. Flush the feeding tube before and after this drug is given.
Dizziness. Upset stomach or throwing up. Many small meals, good mouth care, sucking hard, sugar-free candy, or chewing sugar-free gum may help. Hard stools (constipation). Drinking more liquids, working out, or adding fiber to your diet may help. Talk with your doctor about a stool softener or laxative. Blurred eyesight. Dry mouth. Good mouth care, sucking hard, sugar-free candy, or chewing sugar-free gum may help. See a dentist often.
Take a missed dose as soon as you think about it. - If it is close to the time for your next dose, skip the missed dose and go back to your normal time. - Do not take 2 doses at the same time or extra doses. - Do not change the dose or stop this drug. - Talk with the doctor.
If you have an allergy to trihexyphenidyl or any other part of this drug. Tell your doctor if you are allergic to any drugs. Make sure to tell about the allergy and what signs you had. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
If you think there was an overdose, call your local poison control center or ER right away. Signs of a very bad reaction to the drug. These include wheezing; chest tightness; fever; itching; bad cough; blue or gray skin color; seizures; or swelling of face, lips, tongue, or throat. Very bad dizziness or passing out. Change in thinking clearly and with logic. Not able to pass urine. Very hard stools (constipation). Any rash. Side effect or health problem is not better or you are feeling worse.
Sometimes drugs are not safe when you take them with certain other drugs and food. - Taking them together can cause bad side effects. - Be sure to talk to your doctor about all the drugs you take.
Store in a cool, dry place away from the reach of children. - Medicines must not be used past the expiry date.
Category C : Animal reproduction studies have shown an adverse effect on the fetus and there are no adequate and well-controlled studies in humans, but potential benefits may warrant use of the drug in pregnant women despite potential risks.
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