Zanamivir Bulk Active Substance
Zanamivir is a neuraminidase inhibitor antiviral in bulk form for manufacturing influenza treatments like Relenza inhalers. This mixed constituent product for therapeutic use is not retail-packed, fitting HTS 3003.90.0120 for antivirals.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If as unmixed heterocyclic compound
Single chemical entities are classified in Chapter 29 based on structure, not therapeutic mixture.
If primarily antibiotic rather than antiviral
Anti-infectives are subdivided; antibiotics go to separate subheading within 3003.39.
If sterile and for wound closure use
Chapter notes limit 3006 to specific sterile surgical products, excluding general antivirals.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Comply with FDA import alerts for antivirals; provide GMP certification from manufacturer
• Ensure cold chain documentation if required for stability; avoid temperature excursion pitfalls
• Label as 'for further manufacturing' to prevent retail misclassification
Related Products under HTS 3003.90.01.20
Oseltamivir Phosphate Bulk Powder
Oseltamivir phosphate is a bulk antiviral medicament used primarily for the treatment and prophylaxis of influenza A and B viruses. It consists of mixed active pharmaceutical ingredients not in measured doses or retail packaging, qualifying under HTS 3003.90.0120 as an anti-infective antiviral for therapeutic use.
Acyclovir Bulk Mixture
Acyclovir bulk mixture is an antiviral for herpes simplex and zoster treatments, consisting of mixed APIs and excipients for pharmaceutical formulation. Not in retail doses, it classifies under HTS 3003.90.0120 as a bulk antiviral medicament.
Valacyclovir Hydrochloride Bulk
Valacyclovir hydrochloride bulk is a prodrug antiviral mixed for herpes virus therapy, used in manufacturing tablets like Valtrex. As a non-retail mixed medicament, it falls under HTS 3003.90.0120 for antivirals.
Remdesivir Bulk API Mixture
Remdesivir bulk API mixture is an antiviral for COVID-19 and Ebola treatment, mixed for IV formulation production. Excluded from retail forms, it is classified in HTS 3003.90.0120 as a bulk antiviral.
Ganciclovir Bulk Powder
Ganciclovir bulk powder is an antiviral mixed for cytomegalovirus (CMV) treatment in immunocompromised patients. Not for retail sale, it qualifies under HTS 3003.90.0120 for bulk antivirals.
Ribavirin Bulk Mixture
Ribavirin bulk mixture is a guanosine analog antiviral for hepatitis C and RSV, blended for further processing. As a mixed, non-dosed product, it is under HTS 3003.90.0120.