Drug interactions
Benztropine + Cyclobenzaprine
Severity: Moderate
Benztropine and Cyclobenzaprine: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Both agents are strongly anticholinergic, so combining them raises the risk of dry mouth, constipation, urinary retention, blurred vision, tachycardia, confusion and heat intolerance. Elderly patients are especially susceptible to delirium.
What this interaction means in plain words
Benztropine and Cyclobenzaprine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Benztropine belongs to Central Nervous System; Cyclobenzaprine belongs to Musculoskeletal.
Why it happens
Additive antimuscarinic effects.
What to do
Avoid or limit the combination in older adults and watch for cognitive changes, urinary retention and ileus. Consider a non-anticholinergic muscle relaxant alternative.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Cyclobenzaprine
- Cyclobenzaprine + Isocarboxazid Contraindicated
- Cyclobenzaprine + Linezolid Contraindicated
- Cyclobenzaprine + Phenelzine Contraindicated
- Cyclobenzaprine + Safinamide Contraindicated
- Cyclobenzaprine + Selegiline Contraindicated
- Cyclobenzaprine + Selegiline transdermal Contraindicated
Other interactions of Benztropine
- Benztropine + Memantine-donepezil Major
- Abobotulinumtoxina + Benztropine Moderate
- Amantadine + Benztropine Moderate
- Amitriptyline + Benztropine Moderate
- Amoxapine + Benztropine Moderate
- Atropine iv / + Benztropine Moderate
Frequently asked questions
Can I take Benztropine with Cyclobenzaprine?
MediHelp rates the interaction as moderate. Benztropine and Cyclobenzaprine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both agents are strongly anticholinergic, so combining them raises the risk of dry mouth, constipation, urinary retention, blurred vision, tachycardia, confusion and heat intolerance. Elderly patients are especially susceptible to delirium.
How serious is the interaction between Benztropine and Cyclobenzaprine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid or limit the combination in older adults and watch for cognitive changes, urinary retention and ileus. Consider a non-anticholinergic muscle relaxant alternative.
What other medicines interact with Cyclobenzaprine?
MediHelp also lists interactions of Cyclobenzaprine with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Cyclobenzaprine page.
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