Authorized prescribers must abide by the standards of practice developed by their regulatory college. The standards of practice governing physicians and nurse practitioners require them to personally assess a client prior to providing a prescription. Physicians and nurse practitioners can only prescribe neuromodulators and other medication on Health Canada’s Prescription Drug list when a client assessment has been performed. Physicians can only provide a prescription for “office use” when they personally will be attending the patients for whom they will provide an order for injection. An office use medication (i.e. a multi dose vial) can be used for more than one patient attending a clinic.