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Cogentin Side Effects

Generic Name: benztropine

Note: This page contains information about the side effects of benztropine. Some of the dosage forms included on this document may not apply to the brand name Cogentin.

For the Consumer

Applies to benztropine: oral solution, oral tablet

Other dosage forms:

In addition to its needed effects, some unwanted effects may be caused by benztropine (the active ingredient contained in Cogentin). In the event that any of these side effects do occur, they may require medical attention.

Major Side Effects

You should check with your doctor immediately if any of these side effects occur when taking benztropine:

Incidence not known:
  • Abdominal or stomach cramps or pain
  • aggressive and violent behavior
  • being forgetful
  • bloating
  • burning while urinating
  • confusion about identity, place, and time
  • constipation
  • decrease in frequency of urination
  • decrease in urine volume
  • diarrhea
  • difficult or painful urination
  • difficulty in passing urine (dribbling)
  • difficulty with speaking
  • difficulty with swallowing
  • discouragement
  • dizziness
  • dry mouth
  • extremely high fever or body temperature
  • fast, pounding, or irregular heartbeat or pulse
  • fast, shallow breathing
  • fast, weak heartbeat
  • feeling sad or empty
  • fever
  • headache
  • hot, dry skin
  • irritability
  • lack of appetite
  • lack of sweating
  • listlessness
  • loss of interest or pleasure
  • mood or mental changes
  • muscle cramps
  • muscle weakness
  • nervousness
  • numbness of the fingers
  • pale, clammy skin
  • seeing things that are not there
  • thirst
  • tiredness
  • trouble concentrating
  • trouble with sleeping
  • vomiting

If any of the following symptoms of overdose occur while taking benztropine, get emergency help immediately:

Symptoms of overdose:
  • Blindness
  • blurred vision
  • change in consciousness
  • cold clammy skin
  • decreased vision
  • dizziness
  • eye pain
  • holding false beliefs that cannot be changed by fact
  • lightheadedness
  • loss of consciousness
  • muscle weakness
  • nausea or vomiting
  • no breathing
  • nosebleeds
  • numbness or tingling in the face, arms, or legs
  • shakiness and unsteady walk
  • sweating
  • tearing
  • unsteadiness, trembling, or other problems with muscle control or coordination
  • unusual excitement, nervousness, or restlessness
  • vision problems
  • wheezing

Minor Side Effects

Some of the side effects that can occur with benztropine may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

Incidence not known:
  • Enlarged pupils
  • loss of appetite
  • skin rash
  • weight loss

For Healthcare Professionals

Applies to benztropine: compounding powder, injectable solution, oral tablet

General

Adverse reactions are anticholinergic in nature and include dry mouth, constipation, tachycardia, and blurred vision.[Ref]

Nervous system

Frequency not reported: Numbness of fingers[Ref]

Psychiatric

Frequency not reported: Toxic psychosis, including confusion, disorientation, memory impairment, visual hallucinations, exacerbation of preexisting psychotic symptoms, nervousness, depression[Ref]

Gastrointestinal

Frequency not reported: Constipation, dry mouth, nausea, vomiting, paralytic ileus[Ref]

Ocular

Frequency not reported: Blurred vision, dilated pupils[Ref]

Cardiovascular

Frequency not reported: Tachycardia[Ref]

Genitourinary

Frequency not reported: Urinary retention, dysuria[Ref]

Hypersensitivity

Frequency not reported: Allergic reaction[Ref]

Other

Frequency not reported: Heatstroke, hyperthermia, fever[Ref]

Dermatologic

Frequency not reported: Skin rash[Ref]

References

1. Cerner Multum, Inc. "Australian Product Information." O 0

2. "Product Information. Cogentin (benztropine)." Merck & Co, Inc, West Point, PA.

Not all side effects for Cogentin may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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