Promethazine Hydrochloride from Mexico
Promethazine hydrochloride is a first-generation antihistamine and phenothiazine derivative containing a modified aromatic pyrimidine-like structure, primarily used to treat motion sickness, nausea, and allergic reactions. It falls under HTS 2933.59.21.00 as an aromatic antihistamine principally used as an anti-nauseant, consistent with chapter notes for heterocyclic nitrogen compounds with pyrimidine rings. This chemically defined compound is imported in pure form for pharmaceutical formulation.
Duty Rate — Mexico → United States
Rate breakdown
Import Tips
• Verify USP-grade purity and provide FDA Drug Master File; ensure COA confirms aromatic structure and antihistamine potency
• Common pitfall: mislabeling as general chemical vs drug triggers reclassification
• Obtain prior FDA import alert clearance for bulk APIs