Tell your doctor about all your other medicines, especially:
other medicine to treat Parkinson's disease;
medicine to treat depression, anxiety, mood disorders, or mental illness;
cold or allergy medicine (Benadryl and others);
medicine to treat stomach problems, motion sickness, or irritable bowel syndrome;
medicine to treat overactive bladder; or
bronchodilator asthma medication.
This list is not complete. Other drugs may affect benztropine, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.
 Benztropine drug interactions (more detail)
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