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
110%
Rate breakdown
9903.04.6096.3%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
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• GMP certification mandatory for API; stability studies for 12-month shelf life; differentiate from veterinary formulations under 2934.99.90