Olanzapine and Smoking: Drug Interaction Guide
Quick answer: This combination requires caution. Olanzapine and Smoking can be used together with adjustments and monitoring.
How Olanzapine interacts with Smoking
Polycyclic aromatic hydrocarbons in tobacco smoke induce CYP1A2, increasing olanzapine clearance by 40-98% and reducing plasma concentrations.
What you should do
On smoking cessation, anticipate rising olanzapine levels and consider a 25-50% dose reduction over 1-2 weeks to avoid sedation and EPS.
Key facts
Severity
Moderate — caution required
Mechanism
Polycyclic aromatic hydrocarbons in tobacco smoke induce CYP1A2, increasing olanzapine clearance by 40-98% and reducing ...
Action
On smoking cessation, anticipate rising olanzapine levels and consider a 25-50% dose reduction over 1-2 weeks to avoid s...
Frequently asked questions
Can I take Olanzapine and Smoking together?
With caution. On smoking cessation, anticipate rising olanzapine levels and consider a 25-50% dose reduction over 1-2 weeks to avoid sedation and EPS.
What is the severity of this interaction?
The interaction between Olanzapine and Smoking is classified as Moderate — caution required. Polycyclic aromatic hydrocarbons in tobacco smoke induce CYP1A2, increasing olanzapine clearance by 40-98% and reducing plasma concentrations.
What should I do if I'm prescribed both?
On smoking cessation, anticipate rising olanzapine levels and consider a 25-50% dose reduction over 1-2 weeks to avoid sedation and EPS. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.