Drug interactions
Protriptyline + Scopolamine
Severity: Moderate
Protriptyline 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
Protriptyline is a tricyclic antidepressant with notable anticholinergic activity, and scopolamine adds to this burden. This can produce urinary retention, ileus, tachycardia, blurred vision, raised intraocular pressure and confusion or delirium, particularly in older adults.
What this interaction means in plain words
Protriptyline 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.
Why it happens
Additive muscarinic receptor blockade, with additional central effects.
What to do
Avoid combining in older patients or those with glaucoma, urinary obstruction or cognitive impairment; otherwise monitor for anticholinergic toxicity and reduce doses if it occurs.
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
Frequently asked questions
Can I take Protriptyline with Scopolamine?
MediHelp rates the interaction as moderate. Protriptyline 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. Protriptyline is a tricyclic antidepressant with notable anticholinergic activity, and scopolamine adds to this burden. This can produce urinary retention, ileus, tachycardia, blurred vision, raised intraocular pressure and confusion or delirium, particularly in older adults.
How serious is the interaction between Protriptyline 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 in older patients or those with glaucoma, urinary obstruction or cognitive impairment; otherwise monitor for anticholinergic toxicity and reduce doses if it occurs.
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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