Mirtazapine from China
Mirtazapine is a tetracyclic antidepressant that enhances serotonin and norepinephrine transmission for major depression treatment. Its fused piperazine-piperidine ring system classifies it as a nitrogen-heterocyclic aromatic psychotherapeutic agent.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.6093.5%Pharmaceuticals: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Verify anhydrous vs hemihydrate crystalline form specifications
• Include degradation pathway studies for shelf-life validation
• Prepare for FDA Type III DMF for excipient compatibility