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benztropine mesylate
Cogentin (brand discontinued; generic tablets/injection)
Anticholinergic (EPS agent)⚠ Unverified beta content
At a glance
- Class
- Anticholinergic antiparkinsonian agent
- Black box
- None listed
- Key monitoring
- Response of EPS/dystonia
- Anticholinergic effects: bowel, urine, vision, temperature, HR
- Usual adult dose
- Drug-induced extrapyramidal disorders (label, oral): 1–4 mg once or twice daily; 1–2 mg two or three times daily often gives relief in 1–2 days
- Call provider / escalate if
- Fever, hot dry skin, no sweating (heat stroke / hyperthermia) • Severe constipation, abdominal pain or swelling, vomiting (ileus) • Unable to urinate
Built-in explanation — generated offline from this app’s structured data (no AI, no network). Still unverified beta content.
What it is
- benztropine mesylate (Cogentin (brand discontinued; generic tablets/injection)) — anticholinergic antiparkinsonian agent.
- Used for: Adjunct in therapy of all forms of parkinsonism; Control of extrapyramidal disorders due to neuroleptic drugs.
Usual adult dosing
- Drug-induced extrapyramidal disorders (label, oral): 1–4 mg once or twice daily; 1–2 mg two or three times daily often gives relief in 1–2 days (Reassess need after 1–2 weeks by withdrawing trial.)
- Parkinsonism (label, oral): Usual 1–2 mg/day (range 0.5–6 mg); max 6 mg/day (Increase in 0.5 mg steps at 5–6 day intervals.)
- Acute dystonia (injection): Typically 1–2 mg IM or IV per provider order (Injection label not extracted in this beta – verify dose against the injection label.)
Boxed warning
- None listed in this entry — still review serious warnings.
Monitor
- Response of EPS/dystonia [After dose; reassess within 1–2 weeks]
- Anticholinergic effects: bowel, urine, vision, temperature, HR [Every contact]
Nursing priorities
- Baseline EPS/dystonia symptoms (AIMS/Simpson-Angus), mental status.
- Age (older adults higher risk), glaucoma, BPH/urinary retention, constipation, cardiac arrhythmia.
- Acute dystonia: administer per order (IM/IV), reassess within minutes, airway monitoring; notify provider.
- Monitor bowel function, urinary output, temperature, heart rate and mental status.
- Encourage fluids and avoid overheating.
Major interactions
- Phenothiazines, haloperidol, TCAs, other anticholinergic or antidopaminergic drugs: Paralytic ileus, hyperthermia, heat stroke reported; report GI complaints, fever, heat intolerance promptly.
- Clozapine, olanzapine, hydroxyzine, diphenhydramine, antispasmodics: Additive anticholinergic effects (constipation/ileus, confusion, retention).
Key teaching
- This medicine helps with stiffness, shaking, and muscle spasms caused by some psychiatric medicines.
- It can make your mouth dry, blur your vision, and cause constipation or trouble peeing. Sip water and chew sugar-free gum.
- Avoid getting overheated – it lowers sweating. Drink fluids and rest in cool places.
Optional: AI explanation
Off by default. To enable, add your own API key in Settings (stored only on this device).
Other serious warnings
- Paralytic ileus, hyperthermia and heat stroke (sometimes fatal), especially with phenothiazines/TCAs/other anticholinergics
- Anhidrosis – caution in hot weather
- Does not treat tardive dyskinesia and may worsen it
- Urinary retention (BPH), angle-closure glaucoma
- Confusion, delirium, hallucinations (older adults, high doses)
- Contraindicated in children <3 years
- Mental and physical impairment (driving/machinery)
- Potential for misuse (euphoria)
Sources: FDA label (DailyMed): BENZTROPINE MESYLATE TABLET [MARLEX PHARMACEUTIC
- Response of EPS/dystoniaWhen: After dose; reassess within 1–2 weeks
- Anticholinergic effects: bowel, urine, vision, temperature, HRWhen: Every contact
- Mental status / deliriumEspecially older adults
- Heat intolerance / body temperature
Sources: FDA label (DailyMed): BENZTROPINE MESYLATE TABLET [MARLEX PHARMACEUTIC
Assessment
- Baseline EPS/dystonia symptoms (AIMS/Simpson-Angus), mental status.
- Age (older adults higher risk), glaucoma, BPH/urinary retention, constipation, cardiac arrhythmia.
- Other anticholinergic burden (TCAs, antihistamines, clozapine, olanzapine, hydroxyzine).
- Ambient temperature/heat exposure.
Interventions
- Acute dystonia: administer per order (IM/IV), reassess within minutes, airway monitoring; notify provider.
- Monitor bowel function, urinary output, temperature, heart rate and mental status.
- Encourage fluids and avoid overheating.
- Reassess need regularly; do not use prophylactically without indication.
- Taper rather than stopping abruptly after prolonged use.
Sources: General nursing drug reference conventions (e.g., Davis Drug Guide / L
- Fever, hot dry skin, no sweating (heat stroke / hyperthermia)
- Severe constipation, abdominal pain or swelling, vomiting (ileus)
- Unable to urinate
- Confusion, hallucinations, agitation
- Fast heartbeat, palpitations
- Eye pain, vision changes
- Worsening abnormal movements (tardive dyskinesia)
Sources: FDA label (DailyMed): BENZTROPINE MESYLATE TABLET [MARLEX PHARMACEUTIC · General nursing drug reference conventions (e.g., Davis Drug Guide / L
- Dry mouth
- Blurred vision, mydriasis
- Constipation
- Urinary hesitancy/retention
- Tachycardia
- Drowsiness, dizziness
- Confusion, memory impairment (esp. older adults)
- Decreased sweating, heat intolerance
Sources: FDA label (DailyMed): BENZTROPINE MESYLATE TABLET [MARLEX PHARMACEUTIC
- Phenothiazines, haloperidol, TCAs, other anticholinergic or antidopaminergic drugs MajorParalytic ileus, hyperthermia, heat stroke reported; report GI complaints, fever, heat intolerance promptly.
- Clozapine, olanzapine, hydroxyzine, diphenhydramine, antispasmodics MajorAdditive anticholinergic effects (constipation/ileus, confusion, retention).
- Levodopa, amantadineMay require dose adjustment; additive effects.
- Alcohol, CNS depressantsAdditive drowsiness/impairment.
Sources: FDA label (DailyMed): BENZTROPINE MESYLATE TABLET [MARLEX PHARMACEUTIC
- This medicine helps with stiffness, shaking, and muscle spasms caused by some psychiatric medicines.
- It can make your mouth dry, blur your vision, and cause constipation or trouble peeing. Sip water and chew sugar-free gum.
- Avoid getting overheated – it lowers sweating. Drink fluids and rest in cool places.
- It can cause drowsiness or confusion. Do not drive until you know how it affects you.
- Tell your provider if you have glaucoma, an enlarged prostate, or trouble urinating.
- Do not stop suddenly after long use.
Sources: General nursing drug reference conventions (e.g., Davis Drug Guide / L
Indications
- Adjunct in therapy of all forms of parkinsonism
- Control of extrapyramidal disorders due to neuroleptic drugs (not tardive dyskinesia)
Dosing
- Drug-induced extrapyramidal disorders (label, oral): 1–4 mg once or twice daily; 1–2 mg two or three times daily often gives relief in 1–2 daysReassess need after 1–2 weeks by withdrawing trial.
- Parkinsonism (label, oral): Usual 1–2 mg/day (range 0.5–6 mg); max 6 mg/dayIncrease in 0.5 mg steps at 5–6 day intervals.
- Acute dystonia (injection): Typically 1–2 mg IM or IV per provider orderInjection label not extracted in this beta – verify dose against the injection label.
Sources: FDA label (DailyMed): BENZTROPINE MESYLATE TABLET [MARLEX PHARMACEUTIC
Prescriber-oriented details; limited in this beta.
titration
- Parkinsonism: ↑ 0.5 mg at 5–6 day intervals; max 6 mg/day (label).
geriatric
- Beers criteria: avoid in older adults; strongly anticholinergic.
Sources: FDA label (DailyMed): BENZTROPINE MESYLATE TABLET [MARLEX PHARMACEUTIC
- Verified
- No – unverified beta
- Last reviewed
- 2026-10-29 (drafted; not clinician-reviewed)
- FDA label (DailyMed): BENZTROPINE MESYLATE TABLET [MARLEX PHARMACEUTICAL, INC]
- General nursing drug reference conventions (e.g., Davis Drug Guide / Lexicomp nursing) - summarized from standard practice; NOT line-by-line verified
Reviewer notes – please double-check
- Oral label extracted; the injection (IM/IV) dosing for acute dystonia is general practice – verify against injection label.
- Source label was a generic repackager label (Cogentin brand not currently marketed in U.S.).