Hormones, prostaglandins, thromboxanes and leukotrienes, natural and synthetic, deriv & analogues there of, etc., not elsewhere specified

US trade by year

US imports were $194.9M in the 12 months to Aug 2026, down 21% on the 12 months to Aug 2017. US exports were $20.5M, down 26%. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

• France
• China
• Italy
• Japan
• All countries

Who supplies the US

August 2026. Small figures under each value are the change from August 2025. Average prices aren't shown because this product's lines are counted in different units.

The 3 largest suppliers had 87.8% of US imports over the last 12 months.

How the market is shifting

Japan gained the most share: 3.1% of US imports over the last 12 months, up from 1.8% in the 12 months before. China lost the most: 14.6%, down from 16.3%. The charts show September 2024 to August 2026 for the 4 largest suppliers over the last 12 months. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

• France
• China
• Italy
• Japan
• All countries

Tariff actions touching this product

When the duty paid on this product changed and stayed changed, for its main suppliers and all countries, newest first, with the Federal Register notices that named the product in the 3 months before. Rates are medians of the 4 months either side, less any usual seasonal swing. A change shows what happened to duty paid, not why; read each notice for what it did.

1. December 2025 · Duty paid: China 20.0% → 5.5%.
   • Implementing Certain Tariff-Related Elements of the Framework for a United States-Switzerland-Liechtenstein Agreement on Fair, Balanced, and Reciprocal TradeDec 18, 2025 · International Trade Administration
   • Implementing Certain Tariff-Related Elements of the U.S.-EU Framework on an Agreement on Reciprocal, Fair, and Balanced TradeSep 25, 2025 · Office of the US Trade Representative
2. March–April 2025 · Duty paid: China 0.0% → 18.9%, all countries 0.2% → 5.5%.

Federal Register notices from the last 12 months that list this product's tariff codes. A notice can add a duty, exclude products from one or only mention them, so read each for what it changes. Search the Federal Register for 2937.90

• Guidance and Procedures for Implementing Tariff Adjustments for Specialty Pharmaceuticals and Associated Pharmaceutical Ingredients and Technical Corrections to the Harmonized Tariff Schedule of the United States for Duties Imposed Under Proclamation 11020Sep 23, 2026 · Bureau of Industry and Security
• Notice of Action: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal DeforestationJul 20, 2026 · Office of the US Trade Representative
• Notice of Determination and Request for Comments Concerning Action Pursuant to Section 301: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal DeforestationJun 4, 2026 · Office of the US Trade Representative
• Implementing Certain Tariff-Related Elements of the Framework for a United States-Switzerland-Liechtenstein Agreement on Fair, Balanced, and Reciprocal TradeDec 18, 2025 · International Trade Administration

Markets abroad

Each country's own import figures for this product, from UN Comtrade: the 8 biggest importers outside the US in the latest year each has reported, what they bought from the US, and the change from the year before. Values usually include freight and insurance to the importer's border, so they run a little above US export figures. Countries report a year or more late; 100 have reported 2025 so far.

The biggest market outside the US is France, which imported $83.2M of this product in 2025, under 0.1% of it from the US.

The US supplies 93.9% of imports into Ireland, but under 10% into France, India and China.

Of these, imports into Switzerland grew fastest: up 150% from 2024 to 2025.

Related products

Other products under heading 2937: hormones, natural or synthetic; derivatives thereof and other steriods used primarily as hormones. US trade over the 12 months to August 2026.