Answer
Fluoxetine potently inhibits CYP2D6, the enzyme that metabolises Night Nurse’s dextromethorphan, potentially raising its concentrations several-fold and increasing the risk of toxic effects and serotonin syndrome.
Sources for this answer
- Night NurseHaleon UK Trading Limited · emc · SmPC §4.5 Interaction with other medicinal products · Version 19Document updated
Sources checked