Promethazine Hydrochloride USP from Mexico
Promethazine hydrochloride is a phenothiazine derivative used as an antihistamine, antiemetic, and sedative, containing a phenothiazine ring-system. It falls under HTS 2934.30.43.00 as a specific product listed in additional U.S. note 3 to section VI for nucleic acids, salts, or other heterocyclic compounds with this ring structure. This classification applies to its chemically defined heterocyclic nature without further fusion.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify purity certificates and USP compliance documentation to meet FDA import requirements; declare exact chemical composition to avoid reclassification; check for additional note 3 restrictions under Section VI