Drug interactions
Armodafinil + Diphenoxylate
Severity: Minor
Armodafinil and Diphenoxylate: 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
Diphenoxylate can cause drowsiness, which armodafinil may partly mask. Diphenoxylate is a CYP3A4 substrate, so enzyme induction by armodafinil could modestly lower its exposure.
What this interaction means in plain words
Armodafinil and Diphenoxylate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Armodafinil belongs to Central Nervous System; Diphenoxylate belongs to Gastrointestinal Tract.
Why it happens
Opposing CNS arousal effects, plus possible weak CYP3A4 induction.
What to do
No routine adjustment is needed. Assess antidiarrheal response and avoid exceeding the labeled diphenoxylate dose.
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 Armodafinil
Other interactions of Diphenoxylate
Frequently asked questions
Can I take Armodafinil with Diphenoxylate?
MediHelp rates the interaction as minor. Armodafinil and Diphenoxylate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Diphenoxylate can cause drowsiness, which armodafinil may partly mask. Diphenoxylate is a CYP3A4 substrate, so enzyme induction by armodafinil could modestly lower its exposure.
How serious is the interaction between Armodafinil and Diphenoxylate?
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 needed. Assess antidiarrheal response and avoid exceeding the labeled diphenoxylate dose.
What other medicines interact with Armodafinil?
MediHelp also lists interactions of Armodafinil with, for example, Avapritinib, Elacestrant, Elbasvir / grazoprevir. The full list is on the Armodafinil page.
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