Viagra Generic API (Sildenafil Base) from Canada
Pharmaceutical-grade sildenafil base (non-citrate form) for generic erectile dysfunction medications contains unfused pyrazole ring structure under HTS 2933.19.3500. Bulk imported for salt formation and tablet compression.
Duty Rate — Canada → United States
100%
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
9903.05.900%Articles of aluminum, of steel or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; patented pharmaceutical articles; and semiconductor articles, as provided in subdivision (f) of U.S. note 52 to this subchapter
Import Tips
• Differentiate free base from citrate salt with NMR spectra in documentation
• Include particle size distribution for bioavailability equivalence
• Avoid 2925 classification by emphasizing heterocyclic drug function