CN code 300390 covers other medicaments consisting of two or more constituents mixed together for therapeutic or prophylactic uses, not put up in measured doses or in forms for retail sale, not classified under other subheadings of heading 3003. This is a residual heading covering bulk pharmaceutical preparations whose main active ingredients are not alkaloids, hormones, vitamins, or antibiotics – those are classified under the respective subheadings 300310 to 300360. Products under code 300390 include mixtures of active substances for further formulation, pharmaceutical premixes, medicine concentrates, and other multi-component preparations intended for the production of finished medicines. Single-substance products (containing only one active ingredient) do not fall under heading 3003 but are classified in the appropriate headings of Chapter 28 or 29.

Import of bulk medicines under CN code 300390 is governed by Directive 2001/83/EC on medicinal products for human use. The manufacturer must hold a GMP certificate confirming compliance with Good Manufacturing Practice principles, and the production site should be registered in the EudraGMDP database. The importer must hold an authorisation for manufacturing or importing medicinal products issued by the competent pharmaceutical supervisory authority. Multi-component preparations require documentation of the qualitative and quantitative composition of all active and excipient substances. The pharmacoepidemiological system requires comprehensive documentation enabling traceability of each batch throughout the supply chain. For medicines containing novel or innovative substances, additional requirements for preclinical and clinical safety assessment may apply.

At customs clearance for goods under CN code 300390, the importer should present the manufacturer's GMP certificate, a Certificate of Analysis (CoA) containing the full quantitative composition of the preparation, pharmacopoeial or manufacturer's internal specification, and documentation confirming the pharmaceutical intended use. Customs authorities may request additional clarification on preparation composition to confirm correct tariff classification – for multi-component medicines, it is essential to demonstrate that the product does not contain alkaloids, hormones, or antibiotics as main active substances, as these would require classification under subheadings 300310 to 300360. Duty rates and autonomous suspensions should be checked in TARIC or ISZTAR. Transport must comply with GDP requirements, taking into account specific temperature requirements specified by the manufacturer.

Importing pharmaceutical products under CN code 3003 90 (Other medicines not in doses) requires authorisation from the national medicines agency. All medicines placed on the EU market must hold a marketing authorisation issued by EMA (centralised procedure) or a national authority. Compliance with Good Manufacturing Practice (GMP) confirmed by a certificate is mandatory. Biological products require cold chain maintenance. Serialisation and authenticity verification (FMD 2011/62/EU) are mandatory for prescription medicines.