Levodopa (L-DOPA) from Canada
Levodopa, or L-DOPA, is a direct precursor and structural analogue of dopamine, functioning as a catecholamine hormone prodrug in Parkinson's treatment. It is classified in HTS 2937.90.2000 as a catecholamine derivative used primarily for its hormonal effects in the brain. Meets Chapter 29 definition for hormone structural analogues.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.60100%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
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Provide chiral purity documentation (>99% L-enantiomer) to confirm hormonal analogue status
• Declare oxidation prevention measures in shipping manifests