• Drug carrier

A carrier may be a naturally occurring chemical in the human body or a synthetically designed one that can bind or otherwise interact with a drug to facilitate its movement within the body towards particular target molecules. Such facilitation typically involves enhancing various pharmacokinetic properties of a drug, like improving drug solubility, absorption, permeability, stability, etc. so that the drug's transit and selectivity for targets, effectiveness, or safety in the human body becomes viable or is improved.

Each carrier in DrugBank is considered a [bio entity] and is associated with a unique identification code that starts with “BE”. For example, the code for serum albumin is BE0000530

Note that targets, enzymes, carriers, and transporters may switch roles depending on the drug to which they bind based on each drug's unique pharmacodynamic and pharmacokinetic profiles.