Doxylamine Succinate Powder
Doxylamine succinate, an ethanolamine antihistamine with pyridine ring, is classified under HTS 2933.99.90.00 as a heterocyclic drug. Bulk imported for sleep aids like Unisom and allergy medications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified primarily by amino alcohol function
Oxygen-function amino compounds may supersede heterocyclic.
If bulk tablets with binders for compounding pharmacies
Medicinal forms with excipients go to Chapter 30.
If industrial antihistamine for non-pharma applications
Chemical mixtures outside pharmaceutical use.
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Import Tips & Compliance
• Validate succinic acid salt stoichiometry in COA
• Provide drowsiness warning label compliance documentation
• Check for OTC monograph deviations requiring FDA approval
Related Products under HTS 2933.99.90.00
Caffeine Anhydrous Powder
Pure caffeine anhydrous is a xanthine alkaloid classified as a heterocyclic nitrogen compound under HTS 2933.99.90.00 due to its purine ring structure. It is imported as a pharmaceutical intermediate or drug ingredient for energy supplements and medications.
Theophylline USP Grade
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.
Methimazole Tablets API
Methimazole is an imidazole derivative antithyroid drug, a nitrogen heterocyclic compound specifically under HTS 2933.99.90.00 as a drug. It inhibits thyroid hormone synthesis and is imported as active pharmaceutical ingredient.
Famotidine Active Pharmaceutical Ingredient
Famotidine, a histamine H2-receptor antagonist, features a thiazole-imidazolyl nitrogen heterocyclic structure qualifying for HTS 2933.99.90.00. Imported as bulk drug substance for acid reflux medications like Pepcid.
Loperamide Hydrochloride Bulk Drug
Loperamide HCl, an antidiarrheal piperidine derivative, is a nitrogen heterocyclic compound imported under HTS 2933.99.90.00 as a drug. Its opioid receptor agonist structure fits Chapter 29 drug specifications.
Pyridostigmine Bromide API
Pyridostigmine bromide, a quaternary pyridinium cholinesterase inhibitor, falls under HTS 2933.99.90.00 as a nitrogen heterocyclic drug. Used for myasthenia gravis treatment, imported as sterile bulk powder.