Before Using

Drug information provided by: Micromedex

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

No information is available on the relationship of age to the effects of trihexyphenidyl in the pediatric population. Safety and efficacy have not been established.

Geriatric

No information is available on the relationship of age to the effects of trihexyphenidyl in geriatric patients. However, elderly men are more likely to have age-related prostate problems, and all elderly patients are more likely to have age-related kidney, liver, or heart problems. These conditions may require caution or an adjustment in the dose for patients receiving trihexyphenidyl.

Breastfeeding

Studies suggest that this medication may alter milk production or composition. If an alternative to this medication is not prescribed, you should monitor the infant for side effects and adequate milk intake.

Drug Interactions

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

  • Potassium

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Betel Nut
  • Chlorpromazine
  • Haloperidol
  • Perphenazine

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Other Medical Problems

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

  • Bowel or stomach blockage or
  • Enlarged prostate or
  • Glaucoma or
  • Hypertension (high blood pressure) or
  • Urinary blockage—Use with caution. May make these conditions worse.
  • Kidney disease or
  • Liver disease—Use with caution. Effects may be increased because of slower removal of the medicine from the body.