What is the maximum amount of a controlled substance a pharmacist can provide during a partial fill?

The maximum amount of a controlled substance that a pharmacist can provide during a partial fill is typically the entire prescribed amount only. This aligns with federal regulations regarding controlled substances, which state that a partial fill can occur but cannot exceed the originally prescribed total quantity.

In instances of partial fills, the pharmacist must ensure that the total amount of the drug dispensed does not exceed what was prescribed by the healthcare provider. If a patient requests only a portion of the total prescription or if there are any other circumstances allowing a partial fill, the pharmacist must still adhere to the total ordered by the prescriber. Providing the full prescribed amount as a partial fill would not be compliant with these regulations.

In contrast, the other options suggest varying levels of flexibility that do not conform to the standard regulations guiding the dispensing of controlled substances. Only issuing the full prescribed amount ensures both compliance with legal standards and proper oversight of controlled substance dispensing.