Interaction of Fluoxetine and Caffeine in a Patient With Substance-Induced Mania - PubMed
6 hours ago
- #mania
- #caffeine
- #fluoxetine
- A 42-year-old male with no prior psychiatric history developed acute mania symptoms after starting fluoxetine and accidentally taking double the prescribed dose.
- The patient exhibited classic manic symptoms including elevated mood, grandiosity, pressured speech, and decreased need for sleep.
- Laboratory tests were normal except for cannabis detected in urine drug screening.
- The manic episode may have been triggered by excessive fluoxetine combined with high caffeine intake, with fluoxetine potentially inhibiting CYP1A2 and increasing caffeine levels.
- Treatment involved discontinuing fluoxetine and administering valproate and haloperidol, leading to symptom improvement.
- The case highlights the importance of assessing stimulant use and medication dosing in new-onset manic symptoms.