Acyclovir from Canada
Acyclovir is a guanosine nucleoside analog with a purine heterocyclic base, used as antiviral drug against herpes viruses. This acyclic nucleic acid derivative qualifies under HTS 2934.99.4700 as a pharmaceutical drug heterocyclic compound. Its specific antiviral therapeutic use defines classification.
Duty Rate — Canada → 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
• GMP certification mandatory for API; stability studies for 12-month shelf life; differentiate from veterinary formulations under 2934.99.90