What Are the Most Common Benztropine Side Effects?

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  • Written By: Meshell Powell
  • Edited By: Melissa Wiley
  • Last Modified Date: 19 May 2019
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Most patients who use benztropine experience few if any side effects, although any persistent or bothersome symptoms that develop after beginning treatment with this medication should be reported to a doctor for further evaluation. Some of the most frequently reported benztropine side effects include dizziness, dry mouth, or painful urination. More serious potential side effects include confusion, changes in heart rate, or allergic reactions. Any specific questions or concerns about possible benztropine side effects in an individual situation should be discussed with a doctor or other medical professional.

Mild to moderate dizziness is among the most common benztropine side effects, so care should be taken when operating machinery or performing tasks that require a significant amount of focus or concentration. Dry mouth or a decreased ability to sweat are also possible when taking the medication. Urination may become difficult or painful, especially in older male patients. The pupils may appear to be dilated, and vision may become blurry. While these symptoms are usually mild, a doctor should be consulted if they persist or become particularly bothersome so the condition can be monitored further.


Serious benztropine side effects that should be reported to a medical professional immediately include confusion or changes in mood or behavior patterns. Some patients may become aggressive or exhibit self-harm tendencies. If this occurs, the caregiver should call emergency services for assistance. Any loss of consciousness, even if only for a few moments, is a potential cause for concern. Patients who experience hallucinations or seizures should receive immediate medical attention.

Sudden or severe abdominal pain, especially if combined with fever or vomiting, may indicate the development of serious complications. These benztropine side effects may be a result of damage to the digestive tract and can be fatal if not promptly treated. Black or bloody stool or vomit that resembles coffee grounds should be treated as a medical emergency.

Allergic reactions are among the possible benztropine side effects and may range from mild to potentially fatal. Most of these reactions are relatively mild in nature and may involve skin itching or the appearance of a rash. A severe type of allergic reaction known as anaphylaxis can cause brain injury or death within a matter of minutes without emergency medical attention. Symptoms of an anaphylactic reaction may include chest pain, facial swelling, or difficulty breathing. The patient may begin to sweat profusely, feel dizzy, or lose partial or complete consciousness.



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