Olanzapine and Theophylline interaction
Olanzapine and Theophylline: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Theophylline label · effective 2026-01-29
25% increase Diazepam Benzodiazepines increase CNS concentrations of adenosine, a potent CNS depressant, while theophylline blocks adenosine receptors.
From the Olanzapine (Zyprexa) label · effective 2026-02-11
Theophylline — Multiple doses of olanzapine did not affect the pharmacokinetics of theophylline or its metabolites.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.