Benztropine: uses, dosing, side effects & brands
Benztropine is an anticholinergic sold in the U.S. under 2 brand and generic names, for drug-induced abnormalities and parkinson disease. Below: what the FDA label says, every product that contains it, what the pills look like, and its recall record.
Key facts
- Drug class
- Anticholinergic
- Treats (across its forms)
- Drug-Induced Abnormalities and Parkinson Disease
- Available as
- Tablet · Injectable · Solution
- Sold as
- 2 products — Cogentin and Benztropine Mesylate
- Prescription?
- Prescription only
- Generic available?
- Yes
How benztropine is dosed
From the FDA label for Benztropine Mesylate (application ANDA091525). Other benztropine products — different forms, different strengths — are dosed differently. Follow the label for the one you were prescribed.
Since there is no significant difference in onset of effect after intravenous or intramuscular injection, usually there is no need to use the intravenous route. The drug is quickly effective after either route, with improvement sometimes noticeable a few minutes after injection. In emergency situations, when the condition of the patient is alarming, 1 to 2 mL of the injection normally will provide quick relief. If the parkinsonian effect begins to return, the dose can be repeated. Because of cumulative action, therapy should be initiated with a low dose which is increased gradually at five or six-day intervals to the smallest amount necessary for optimal relief. Increases should be made in increments of 0.5 mg, to a maximum of 6 mg, or until optimal results are obtained without excessive adverse reactions. Postencephalitic and Idiopathic Parkinsonism: The following dosing guidelines were written in reference to both benztropine mesylate tablets and Benztropine mesylate injection, USP. Benztropine mesylate tablets should be used when patients are able to take oral medication. The usual daily dose is 1 to 2 mg, with a range of 0.5 to 6 mg parenterally. As with any agent used in parkinsonism, dosage must be individualized according to age and weight, and the type of parkinsonism being treated. Generally, older patients, and thin patients cannot tolerate large doses. Most patients…
Benztropine side effects
The adverse reactions below, most of which are anticholinergic in nature, have been reported and within each category are listed in order of decreasing severity. Cardiovascular: Tachycardia. Digestive: Paralytic ileus, constipation, vomiting, nausea, dry mouth. If dry mouth is so severe that there is difficulty in swallowing or speaking, or loss of appetite and weight, reduce dosage, or discontinue the drug temporarily. Slight reduction in dosage may control nausea and still give sufficient relief of symptoms. Vomiting may be controlled by temporary discontinuation, followed by resumption at a lower dosage. Nervous System: Toxic psychosis, including confusion, disorientation, memory impairment, visual hallucinations; exacerbation of pre-existing psychotic symptoms; nervousness; depression; listlessness; numbness of fingers. Special Senses: Blurred vision, dilated pupils. Urogenital: Urinary retention, dysuria. Metabolic/Immune or Skin: Occasionally, an allergic reaction, e.g., skin rash, develops. If this cannot be controlled by dosage reduction, the medication should be discontinued. Other: Heat stroke, hyperthermia, fever. To report SUSPECTED ADVERSE REACTIONS, contact Zydus Pharmaceuticals USA Inc. at 1-877-993-8779 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch .
Who shouldn’t take benztropine
Hypersensitivity to any component of Benztropine mesylate injection, USP. Because of its atropine-like side effects, this drug is contraindicated in pediatric patients under three years of age, and should be used with caution in older pediatric patients.
Every benztropine product we track (2)
Same active ingredient — different manufacturer, form, price and FDA recall record. That last one is what our independent score measures.
| # | Drug | Rating | Type | Form | Generic? | Pharmacy pays | |
|---|---|---|---|---|---|---|---|
| 1 | 70/100 | Prescription | Tablet | No data | — | View → | |
| 2 | Not yet rated | Prescription | Injectable | No data | — | View → |
What benztropine pills look like
Imprint codes, colour and shape from the FDA’s labelling data. Match the imprint on your pill — or search any imprint.
How long benztropine keeps
No benztropine label we read sets a separate limit for after opening, but they do specify how it must be stored — and the stability behind any date assumes those conditions.
Does benztropine expire? The in-use limits and storage rules from its labelsBenztropine and breastfeeding
From LactMed, the US National Library of Medicine’s Drugs and Lactation Database — quoted, not rewritten.
Full LactMed record for benztropine: levels in milk, effects in breastfed infants, and the drugs it would consider insteadNo information is available on the use of benztropine during breastfeeding. Long-term use of benztropine might reduce milk production or milk letdown, but a single dose is not likely to interfere with breastfeeding. During long-term use, observe for signs of decreased lactation (e.g., insatiety, poor weight gain).
National Institute of Child Health and Human Development, record revised December 15, 2024. LactMed states its information is not a substitute for professional judgement.
What people report to the FDA about benztropine
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 2,725 reports naming benztropine, and the FDA flagged 75% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- granulocytopenia152 reports
- tremor128 reports
- diabetes mellitus122 reports
- weight increased116 reports
- confusional state107 reports
- constipation100 reports
- nausea98 reports
- type 2 diabetes mellitus94 reports
Read these as a signal, not a rate. A report does not mean benztropine caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label section above.
Source: openFDA drug/event (FAERS), retrieved August 25, 2026.
Related calculators
Frequently asked questions
What is benztropine?
Benztropine Mesylate is an anticholinergic used to treat Drug-Induced Abnormalities, Parkinson Disease.
What kind of drug is benztropine?
The FDA classifies benztropine as an anticholinergic. Anticholinergic drugs block acetylcholine, the chemical messenger of the body's "rest and digest" nervous system, by occupying its muscarinic receptors. This eases muscle spasms, dries up secretions, relaxes the bladder and airways, and speeds the heart, depending on the tissue. If you are checking whether it is safe to combine with something else, the class is what matters — two drugs from the same class usually should not be stacked.
Can you take benztropine with other medicines?
It depends on the medicine. We check it against the FDA labels rather than guessing: our interaction checker searches each drug's own label for the other and quotes what it says, naming the section it came from. Run benztropine against whatever else you take — and remember that a label not naming a drug is not the same as that combination being safe.
What brand names is benztropine sold under?
We track 2 benztropine-containing products in the U.S.: Cogentin and Benztropine Mesylate. They are the same active ingredient; they differ in form, manufacturer, price and FDA recall record.
What forms does benztropine come in?
Across the brands we track, benztropine is currently marketed as tablet, injectable and solution, per the FDA's National Drug Code Directory. Each form is dosed differently — follow the label for the exact product you were prescribed.
Is there a generic benztropine?
Yes. Our catalog lists 1 generic benztropine product alongside the brand versions. A generic has the same active ingredient and must meet the FDA's bioequivalence standard; it usually costs less. Ask your pharmacist which one your plan covers.
Cite this page
- APA
- pharmaranks. (2026, July 24). Benztropine: uses, dosing, side effects & brands. https://pharmaranks.com/drugs/benztropine
- MLA
- “Benztropine: uses, dosing, side effects & brands.” pharmaranks, 24 July 2026, https://pharmaranks.com/drugs/benztropine.
We summarise public FDA and NIH sources — for a clinical claim, cite the primary source we link to as well.
Sources: FDA openFDA drug label, National Drug Code Directory, and Enforcement (recall) database. This page reproduces public FDA data and is not medical advice. Dosing is set by your prescriber.
Read the full FDA label for benztropine on DailyMed (NIH) ↗.