Nothing in this subsection may be construed to prevent a health care practitioner from prescribing a medication for an off-label use or from prescribing a medication on more than one occasion when the health care practitioner determines it is medically appropriate.

A carrier that requires failure on one or more drugs as a condition of prior authorization for a nonpreferred drug may not collect a copayment greater than the lowest cost preferred drug copayment in the same drug class from an enrollee having satisfied the prior authorization requirements, as judged by the prescribing health care practitioner. Nothing in this subsection may be construed to prevent a carrier from collecting tiered copayments from enrollees not subject to the prior authorization requirements set forth in this subsection.