9. PRESCRIBING AND DISPENSING
9.10 Use of Metric Units
Prescriptions for compendial articles shall be written to state the quantity and/or strength desired in metric units unless otherwise indicated in the individual monograph (see also Units of Potency, section 5.50.10 above). If an amount is prescribed by any other system of measurement, only an amount that is the metric equivalent of the prescribed amount shall be dispensed. Apothecary unit designations on labels and labeling shall not be used.
9.20 Changes in Volume
In the dispensing of prescription medications, slight changes in volume owing to variations in room temperatures may be disregarded.