Drug interactions
Henbane + Neostigmine
Severity: Moderate
Henbane and Neostigmine: 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
Henbane contains hyoscyamine and scopolamine, antimuscarinic alkaloids that oppose the muscarinic effects of neostigmine. The result may be reduced efficacy of neostigmine on gut, bladder or secretions, or masking of cholinergic toxicity.
What this interaction means in plain words
Henbane and Neostigmine 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
Pharmacodynamic antagonism: antimuscarinic alkaloids oppose acetylcholine accumulation caused by cholinesterase inhibition.
What to do
Avoid the herbal product where possible; if used, monitor for loss of neostigmine effect and for signs of anticholinergic toxicity.
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 Neostigmine
Frequently asked questions
Can I take Henbane with Neostigmine?
MediHelp rates the interaction as moderate. Henbane and Neostigmine 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. Henbane contains hyoscyamine and scopolamine, antimuscarinic alkaloids that oppose the muscarinic effects of neostigmine. The result may be reduced efficacy of neostigmine on gut, bladder or secretions, or masking of cholinergic toxicity.
How serious is the interaction between Henbane and Neostigmine?
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 the herbal product where possible; if used, monitor for loss of neostigmine effect and for signs of anticholinergic toxicity.
What other medicines interact with Neostigmine?
MediHelp also lists interactions of Neostigmine with, for example, Huperzine a, Physostigmine, Pyridostigmine. The full list is on the Neostigmine page.
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