Drug interactions
Doxylamine + Methocarbamol
Severity: Moderate
Doxylamine and Methocarbamol: 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
Doxylamine is a sedating antihistamine commonly used for insomnia. With methocarbamol it may increase drowsiness and cause next-day impairment of alertness and coordination.
What this interaction means in plain words
Doxylamine and Methocarbamol 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.
Doxylamine belongs to Respiratory; Methocarbamol belongs to Musculoskeletal.
Why it happens
Additive CNS depression from a sedating antihistamine and a centrally acting muscle relaxant.
What to do
Monitor for oversedation and warn patients about driving and hazardous tasks. Avoid in older adults where possible.
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 Methocarbamol
Other interactions of Doxylamine
Frequently asked questions
Can I take Doxylamine with Methocarbamol?
MediHelp rates the interaction as moderate. Doxylamine and Methocarbamol 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. Doxylamine is a sedating antihistamine commonly used for insomnia. With methocarbamol it may increase drowsiness and cause next-day impairment of alertness and coordination.
How serious is the interaction between Doxylamine and Methocarbamol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for oversedation and warn patients about driving and hazardous tasks. Avoid in older adults where possible.
What other medicines interact with Methocarbamol?
MediHelp also lists interactions of Methocarbamol with, for example, Alfentanil, Amobarbital, Belladonna and opium. The full list is on the Methocarbamol page.
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