LU drugs are restricted to which of the following?

LU drugs, or "Limited Use" drugs, are specifically designated for patients who meet certain clinical criteria defined within the Ontario drug benefit framework. These restrictions ensure that LU drugs are utilized effectively and judiciously, focusing on clinical necessity rather than availability to all patients. The use of these medications is guided by evidence and therapeutic guidelines that stipulate particular conditions or diseases that warrant the need for these specialized treatments.

By confining the use of LU drugs to individuals who have specified clinical criteria, the healthcare system can manage the cost and distribution of these often expensive medications more effectively. This system prevents misuse or inappropriate prescriptions, ensuring that those who truly need the medication for their specific health conditions receive it.

The other options provided do not accurately capture the essence of the limitations surrounding LU drugs. While long-term therapy, age, or pregnancy can all influence medication choices, the primary criterion for LU drugs is the presence of specified clinical requirements that justify the use of that particular medication.