What is the first step a pharmacist must take when transferring a prescription?

When transferring a prescription, the pharmacist must write "void" across the front of the original prescription. This action is an essential step that ensures that the original prescription is no longer valid for dispensing. It prevents any potential misuse or confusion regarding the original order once it has been transferred to another pharmacy.

The process of transferring a prescription involves several legal requirements, and documenting that the original is void serves to maintain accurate records and compliance with pharmacy regulations. By marking the original prescription as void, the pharmacist effectively communicates that the medication can only be filled at the receiving pharmacy, or it can only be filled once as per the transfer guidelines.

In this scenario, the other options do not represent the correct first step in the transfer process. For instance, documenting patient information is usually part of the overall process but is not specifically the first step in a transfer. Contacting the receiving pharmacy is also necessary, but it follows the initial act of voiding the original prescription. Checking the DEA number pertains to controlled substances and is vital for compliance, but again, it does not specifically relate to the first action in transferring a prescription. Thus, writing "void" on the original prescription is a critical and initial step in the transfer process.