Cal. Bus. & Prof. Code § 4073.5
(a) A pharmacist filling a prescription order for a prescribed biological product may select an alternative biological product only if all of the following:
(b) Within five days following the dispensing of a biological product, a dispensing pharmacist or the pharmacists’ designee shall make an entry of the specific biological product provided to the patient, including the name of the biological product and the manufacturer. The communication shall be conveyed by making an entry that can be electronically accessed by the prescriber through one or more of the following electronic records systems:
(d) If the pharmacy does not have access to one or more of the entry systems in subdivision (b), the pharmacist or the pharmacist’s designee shall communicate the name of the biological product dispensed to the prescriber using facsimile, telephone, electronic transmission, or other prevailing means, except that communication shall not be required in this instance to the prescriber when either of the following apply:
(e) In no case shall a selection be made pursuant to this section if the prescriber personally indicates, either orally or in his or her own handwriting, “Do not substitute,” or words of similar meaning.
(j) For purposes of this section, the following terms shall have the following meanings: