Drug interactions
Caffeine + Nortriptyline
Severity: Minor
Caffeine and Nortriptyline: 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 may counter the sedation of nortriptyline, but it can also worsen anxiety, tremor, insomnia and palpitations. Caffeine is a CYP1A2 substrate and has only minor effects on tricyclic levels, so significant changes are uncommon.
What this interaction means in plain words
Caffeine and Nortriptyline 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; Nortriptyline belongs to Central Nervous System.
Why it happens
Opposing CNS stimulant and sedative effects; minor pharmacokinetic competition at CYP1A2.
What to do
No routine adjustment is required; advise moderate caffeine intake if palpitations, jitteriness 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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Caffeine and Nortriptyline, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Nortriptyline
- Disopyramide + Nortriptyline Contraindicated
- Dofetilide + Nortriptyline Contraindicated
- Dronedarone + Nortriptyline Contraindicated
- Ibutilide + Nortriptyline Contraindicated
- Isocarboxazid + Nortriptyline Contraindicated
- Methylene blue + Nortriptyline 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 Nortriptyline?
MediHelp rates the interaction as minor. Caffeine and Nortriptyline 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 may counter the sedation of nortriptyline, but it can also worsen anxiety, tremor, insomnia and palpitations. Caffeine is a CYP1A2 substrate and has only minor effects on tricyclic levels, so significant changes are uncommon.
How serious is the interaction between Caffeine and Nortriptyline?
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 adjustment is required; advise moderate caffeine intake if palpitations, jitteriness or insomnia occur.
What other medicines interact with Nortriptyline?
MediHelp also lists interactions of Nortriptyline with, for example, Disopyramide, Dofetilide, Dronedarone. The full list is on the Nortriptyline page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
