Drug interactions
Marijuana + Modafinil
Severity: Minor
Marijuana and Modafinil: 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
Cannabis causes sedation, impaired cognition and tachycardia, whereas modafinil promotes wakefulness. Modafinil is not expected to offset cannabis impairment, and both may increase heart rate or anxiety.
What this interaction means in plain words
Marijuana and Modafinil have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Opposing and partly additive pharmacodynamic CNS and cardiovascular effects.
What to do
Counsel patients that modafinil does not reverse cannabis impairment and to avoid driving; monitor for anxiety or palpitations.
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 Marijuana and Modafinil, 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 Modafinil
Frequently asked questions
Can I take Marijuana with Modafinil?
MediHelp rates the interaction as minor. Marijuana and Modafinil have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Cannabis causes sedation, impaired cognition and tachycardia, whereas modafinil promotes wakefulness. Modafinil is not expected to offset cannabis impairment, and both may increase heart rate or anxiety.
How serious is the interaction between Marijuana and Modafinil?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Counsel patients that modafinil does not reverse cannabis impairment and to avoid driving; monitor for anxiety or palpitations.
What other medicines interact with Modafinil?
MediHelp also lists interactions of Modafinil with, for example, Lenacapavir, Leniolisib, Lorlatinib. The full list is on the Modafinil 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.
