2937.90.40.00/Synthroid Active Ingredient Levothyroxine Sodium/Japan

Synthroid Active Ingredient Levothyroxine Sodium from Japan

Bulk levothyroxine sodium serving as the active ingredient in brand-name Synthroid tablets for hypothyroidism treatment. HTS 2937.90.4000 applies to this specific l-thyroxine sodium salt as a synthetic hormone amino-acid derivative.

Duty Rate — Japan → United States

15%

Rate breakdown

9903.04.6215%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% 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)

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Import Tips

• Brand-specific CoA required; cross-reference with ANDA approvals for generic equivalence

• Monitor for DEA scheduling if combined with controlled substances (unlikely for pure API)