Flunarizine Dihydrochloride from Mexico
Flunarizine dihydrochloride is a calcium channel blocker used for migraine prophylaxis, featuring a piperazine ring. It qualifies for HTS 2921.30.10.00 as a derivative of cyclanic polyamines from aromatic compounds listed in U.S. note 3.
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
• Submit advance chemical structure diagrams confirming piperazine-aromatic linkage
• Comply with DEA precursor chemical reporting if applicable
• Use refrigerated transport for stability during import