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2933.99.90.00/Theophylline USP Grade/Canada

Theophylline USP Grade from Canada

Theophylline is a methylxanthine bronchodilator drug with a fused imidazole-pyrimidine heterocyclic structure, falling under HTS 2933.99.90.00. Used primarily in respiratory medications, it qualifies as a 'drug' per tariff specifications.

Duty Rate — Canada → United States

13.7%

Rate breakdown

9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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Import Tips

• Provide USP certificate and DMF for FDA import clearance

• Label as 'Rx only' to avoid OTC misclassification issues

• Monitor DEA precursor status for diversion control

Theophylline USP Grade from Canada — Import Duty Rate | HTS 2933.99.90.00