Drug interactions
Amitriptyline + Caffeine
Severity: Minor
Amitriptyline and Caffeine: 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 can offset some tricyclic-induced drowsiness, while both can increase heart rate. Caffeine is metabolised by CYP1A2, which also contributes to amitriptyline metabolism, so competition may modestly change levels.
What this interaction means in plain words
Amitriptyline and Caffeine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Amitriptyline belongs to Central Nervous System; Caffeine belongs to Miscellaneous.
Why it happens
Opposing CNS effects with possible competition for CYP1A2 metabolism.
What to do
No routine action is needed. Advise moderation in caffeine intake if palpitations, tremor or insomnia occur.
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 Amitriptyline
- Amitriptyline + Isocarboxazid Contraindicated
- Amitriptyline + Methylene blue Contraindicated
- Amitriptyline + Phenelzine Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amitriptyline + Procarbazine Contraindicated
- Amitriptyline + Safinamide 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 Amitriptyline with Caffeine?
MediHelp rates the interaction as minor. Amitriptyline and Caffeine 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 can offset some tricyclic-induced drowsiness, while both can increase heart rate. Caffeine is metabolised by CYP1A2, which also contributes to amitriptyline metabolism, so competition may modestly change levels.
How serious is the interaction between Amitriptyline and Caffeine?
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 routine action is needed. Advise moderation in caffeine intake if palpitations, tremor or insomnia occur.
What other medicines interact with Amitriptyline?
MediHelp also lists interactions of Amitriptyline with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Amitriptyline page.
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