What Types of medicines will need to be taken more frequently to ensure its blood concentration falls within the therapeutic range?

Medications with a narrow therapeutic index, such as warfarin, lithium, and certain anticonvulsants (like phenytoin or carbamazepine), often require more frequent dosing to maintain their blood concentrations within the therapeutic range. Additionally, short-acting medications or those with rapid clearance rates may necessitate more frequent administration to prevent subtherapeutic levels. Regular monitoring and dose adjustments are crucial for these medications to ensure efficacy and safety.