Heading 3003 covers medicament mixtures that are NOT in measured dosage form and NOT put up for retail sale — they are bulk pharmaceutical preparations intended for further processing or repackaging. Heading 3004 covers the same types of products once they are in measured doses (tablets, capsules, ampoules) or packaged for retail. The stage of processing and packaging at the time of importation determines which heading applies.

Yes. Medicament mixtures containing ephedrine (300341) or pseudoephedrine (300342) remain subject to DEA List I chemical controls regardless of the mixture form. Importers must hold DEA registration, comply with import quota requirements, and file required reports. The mixture form does not remove the controlled-substance obligations that attach to the alkaloid content.