Theophylline Vet Extended-Release Tablets from China
Extended-release theophylline tablets, a xanthine alkaloid derivative, treat bronchial asthma in dogs with measured daily dosing. Packaged for retail veterinary sale. Classified under HTS 3004.49.00.05 as veterinary therapeutic containing alkaloids.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.60100%Pharmaceuticals: patented pharma articles — 100% floor rate
9903.05.860%Universal product exemption (U.S. note 52(b))
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
• Dissolution profile testing required for ER formulations
• Distinguish from human versions via vet-specific strength/packaging
• Combo with antibiotics risks 3004.40 reclassification