Flunarizine Dihydrochloride from Canada
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 — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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