Drug interactions
Caffeine + Methadone
Severity: Minor
Caffeine and Methadone: minor 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
Caffeine is a stimulant that may partly offset methadone-related drowsiness, but it does not reliably reverse respiratory depression. There is no clearly established, clinically significant interaction.
What this interaction means in plain words
Caffeine and Methadone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Caffeine belongs to Miscellaneous; Methadone belongs to Musculoskeletal.
Why it happens
Opposing pharmacodynamic effects on alertness; caffeine acts through adenosine receptor antagonism and does not reverse opioid respiratory depression.
What to do
No dose change is needed. Do not rely on caffeine to counter methadone sedation; reassess the methadone dose if drowsiness is excessive.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Methadone
- Alvimopan + Methadone Contraindicated
- Calcium / magnesium / potassium / sodium oxybates + Methadone Contraindicated
- Droperidol + Methadone Contraindicated
- Ibutilide + Methadone Contraindicated
- Isocarboxazid + Methadone Contraindicated
- Lefamulin + Methadone Contraindicated
Other interactions of Caffeine
- Caffeine + Ephedrine Major
- Caffeine + Fezolinetant Major
- Caffeine + Methylenedioxymethamphetamine Major
- Caffeine + Selegiline transdermal Major
- Adenosine + Caffeine Moderate
- Benzphetamine + Caffeine Moderate
Frequently asked questions
Can I take Caffeine with Methadone?
MediHelp rates the interaction as minor. Caffeine and Methadone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Caffeine is a stimulant that may partly offset methadone-related drowsiness, but it does not reliably reverse respiratory depression. There is no clearly established, clinically significant interaction.
How serious is the interaction between Caffeine and Methadone?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No dose change is needed. Do not rely on caffeine to counter methadone sedation; reassess the methadone dose if drowsiness is excessive.
What other medicines interact with Methadone?
MediHelp also lists interactions of Methadone with, for example, Alvimopan, Calcium / magnesium / potassium / sodium oxybates, Droperidol. The full list is on the Methadone page.
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