Drug interactions
Methocarbamol + Opium tincture
Severity: Major
Methocarbamol and Opium tincture: major interaction.
Last updated Sources: US FDA label
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
Opioids such as opium tincture cause sedation and respiratory depression, and muscle relaxants can add to these effects. The combination may lead to profound drowsiness, slowed breathing and impaired consciousness.
What this interaction means in plain words
Methocarbamol and Opium tincture can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Additive CNS and respiratory depression.
What to do
Use the lowest effective doses and the shortest duration, and monitor respiratory rate and level of sedation. Counsel patients and caregivers on warning signs and avoid alcohol.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Methocarbamol
Frequently asked questions
Can I take Methocarbamol with Opium tincture?
MediHelp rates the interaction as major. Methocarbamol and Opium tincture can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Opioids such as opium tincture cause sedation and respiratory depression, and muscle relaxants can add to these effects. The combination may lead to profound drowsiness, slowed breathing and impaired consciousness.
How serious is the interaction between Methocarbamol and Opium tincture?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective doses and the shortest duration, and monitor respiratory rate and level of sedation. Counsel patients and caregivers on warning signs and avoid alcohol.
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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