Theophylline from Mexico
Theophylline is a methylxanthine bronchodilator drug containing fused purine heterocyclic rings, used for asthma treatment. Falls under HTS 2934.99.4700 as a 'drug' heterocyclic compound per its pharmaceutical application and chemical definition. Excluded from earlier alkaloid headings due to specific drug status.
Duty Rate — Mexico → 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
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide stability data for shipping conditions; FDA prior notice required; avoid bulk packaging over 25kg to prevent intermediate classification