The concentration of the components in parenteral products may be expressed in various ways such as percentage weight/volume, weight per unit volume and millimoles per unit volume.

Single-dose Preparations

Single-dose preparations are defined as the volume of injection in a single-dose container sufficient to permit the withdrawal and administration of a nominal dose.

Multiple-dose Preparations

Multiple-dose preparations are multidose injections containing a suitable antimicrobial preservative at an appropriate concentration.