I would opt for molecule as they refer to impact they have on the environment. Disposal of "drugs" can be complicated by the actual molecule.

Compositions is the molecules that make up the drug while formulation is how they are mixed together. As "molecules" is more about the ingredients than the mixing, I think this is best

This is what we use in all our publications

USP Therapeutic Categories Model Guidelines | FDA
www.fda.gov › usp-therapeutic-cate...
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28 mars 2018 — Therapeutic Category, Pharmacologic Class, Formulary Key Drug Types. Analgesics ... Gamma-aminobutyric Acid (GABA) Augmenting Agents.

FDA COMBATING COVID-19 WITH THERAPEUTICS
www.fda.gov › media › download
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24 sept. 2020 — for therapeutic agents in the planning stages. The FDA continues to provide advice, guidance, and technical assistance to help expedite the.

This should work in the context.

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“chemicals” is another option, maybe even better.


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All drugs are made up of two core components—the API, which is the central ingredient, and the excipient, the substances other than the drug that help deliver the medication to your system.
https://www.verywellhealth.com/api-active-pharmaceutical-ing...

Molecules are tiny particles, the component parts which make up an animate object.

"Molecules are the smallest part of a substance that retain its chemical and physical properties, and are composed of two or more atoms. Molecules are a group of similar atoms held together by chemical forces."

"Des molecules sont la partie plus petite d'une substance qui gardent ses propriétés physique et chimiques, composées de deux ou plus de deux atoms. Des molécules sont un groupe d'atoms semblables maintenus ensemble d'une force chimique."



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Note added at 27 mins (2020-11-01 15:20:58 GMT)
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In terms of the pharmaceutical industry the molecules are some of the component parts which together are formed to make medications.

Dedans l'industrie pharmaceutique les molécules sont des parties componentes qui se forment ensemble pour faire (créer) des médications.

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https://www.sigmaaldrich.com/industries/pharma/small-molecul...

"When analyzing small molecules the overarching need is to maximize sensitivity without compromising laboratory reproduction throughout."



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Molecules can be considered as compounds composed of very tiny parts.

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https://www.wisegeek.com/what-is-a-prophylactic-vaccination....

"A prophylactic vaccination is a selected exposure to a weakened or diluted form of an infectious agent to encourage a patient to form antibodies (resistance against the disease). If a patient is exposed to the infectious agent, the antibody will help prevent the spread of infection."

https://medical-dictionary.thefreedictionary.com/prophylacti...

"The main problem is that the virus against which the vaccination is directed must have a different N sub-type than the virus present in the vaccine, which, for prophylaxis vaccination, is impossible to establish beforehand."

"Un vaccin prophylactic est une exposée choisie d'une forme diluie et débilitée d'un agent infecté pour encourager un patient à former ses propres antigens (anticorps) ou résistence en contre la maladie. Si le patient est exposé à l'agent infecté l'anticorps empêchera plus d'infection."

"Le problème principal c'est que le virus en contre lequel le vaccin est dirigé doit avoir un sub-type à différence que la N, à différence que le virus présent dans le vaccin, ce qui, pour le vaccin prophylactic est impossible d'établir avant."