Drug interactions
Caffeine + Oxycodone
Severity: Minor
Caffeine and Oxycodone: 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 mild stimulant and may partly offset the drowsiness caused by oxycodone, while it does not reduce opioid respiratory depression. The practical effect is small and unpredictable, and patients may wrongly feel more alert than they are.
What this interaction means in plain words
Caffeine and Oxycodone 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; Oxycodone belongs to Musculoskeletal.
Why it happens
Opposing pharmacodynamic effects on CNS arousal, with caffeine acting as an adenosine receptor antagonist.
What to do
No dose change is usually needed; advise patients not to rely on caffeine to counter opioid sedation before driving or operating machinery.
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 Oxycodone
- Alvimopan + Oxycodone Contraindicated
- Calcium / magnesium / potassium / sodium oxybates + Oxycodone Contraindicated
- Isocarboxazid + Oxycodone Contraindicated
- Olanzapine / samidorphan + Oxycodone Contraindicated
- Oxycodone + Phenelzine Contraindicated
- Oxycodone + Sodium oxybate 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 Oxycodone?
MediHelp rates the interaction as minor. Caffeine and Oxycodone 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 mild stimulant and may partly offset the drowsiness caused by oxycodone, while it does not reduce opioid respiratory depression. The practical effect is small and unpredictable, and patients may wrongly feel more alert than they are.
How serious is the interaction between Caffeine and Oxycodone?
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 usually needed; advise patients not to rely on caffeine to counter opioid sedation before driving or operating machinery.
What other medicines interact with Oxycodone?
MediHelp also lists interactions of Oxycodone with, for example, Alvimopan, Calcium / magnesium / potassium / sodium oxybates, Isocarboxazid. The full list is on the Oxycodone page.
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