Drug interactions
Benztropine + Scopolamine
Severity: Moderate
Benztropine and Scopolamine: 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 drugs are centrally active antimuscarinics, so their combination can cause marked dry mouth, constipation, urinary retention, tachycardia, confusion and hallucinations. Older patients and those with glaucoma or prostatic enlargement are at greater risk.
What this interaction means in plain words
Benztropine and Scopolamine 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; Scopolamine belongs to Respiratory.
Why it happens
Additive muscarinic receptor antagonism.
What to do
Avoid combining where possible, or use the lowest doses and monitor for anticholinergic toxicity and cognitive effects. Choose a non-anticholinergic alternative in elderly patients.
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 Scopolamine
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 Scopolamine?
MediHelp rates the interaction as moderate. Benztropine and Scopolamine 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 drugs are centrally active antimuscarinics, so their combination can cause marked dry mouth, constipation, urinary retention, tachycardia, confusion and hallucinations. Older patients and those with glaucoma or prostatic enlargement are at greater risk.
How serious is the interaction between Benztropine and Scopolamine?
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 combining where possible, or use the lowest doses and monitor for anticholinergic toxicity and cognitive effects. Choose a non-anticholinergic alternative in elderly patients.
What other medicines interact with Scopolamine?
MediHelp also lists interactions of Scopolamine with, for example, Benzhydrocodone / acetaminophen, Buprenorphine long-acting, Buprenorphine subdermal implant. The full list is on the Scopolamine page.
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