Sildenafil Citrate API from Mexico
Sildenafil citrate, the active ingredient in Viagra, contains a pyrazole ring within its heterocyclic structure for erectile dysfunction treatment. Falls under HTS 2933.19.4500 as a pyrazole-containing drug per Chapter 29 chemical classification rules. Supplied as bulk powder for tablet formulation.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.6096.3%Pharmaceuticals: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Include FDA-approved DMF and polymorphic form specifications; citrate salt must match USP monograph
• Declare exact purity (≥98.5%) and provide HPLC chromatograms confirming pyrazole integrity