From the databaseWhat the row says.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
Scope
Supplement × Prescription
Last verified
June 4, 2026
CautionEmerging evidence
What is happening. Ginkgo has seizure case reports, and clozapine has a dose-related seizure boxed warning.
Mechanism. Potential additive seizure-threshold lowering.
Recommendation. Avoid ginkgo in patients taking clozapine, especially at higher clozapine doses or with any seizure risk factor.
Stack Score
How it moves the number.
Effect on the composite score
If both Clozapine and Ginkgo Biloba are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.
SourcesSources, by evidence tier.
Every claim on this page is cited. PMIDs link straight to PubMed.
Reference material
1- 1U.S. National Library of Medicine. Clozapine tablets US Prescribing Information. 2026.Needs sourceNo link