What is a primary reason standalone prescription drug plans are popular?

Standalone prescription drug plans are popular primarily because they often provide lower costs compared to traditional medical plans. These plans are specifically designed to cover prescription medications, which can lead to significant savings for beneficiaries who require regular pharmaceutical treatment. By focusing solely on prescription drugs, these plans can streamline costs and benefits, often resulting in lower premiums and out-of-pocket expenses compared to comprehensive healthcare plans that blend medical and prescription coverage. This financial aspect is particularly appealing to individuals who may not need extensive medical services but require consistent access to medications.

In contrast, the other options present characteristics that do not capture the primary appeal of standalone prescription drug plans. For instance, requiring detailed receipts can be a burden for consumers rather than a benefit, and while some plans have varying formularies, having no restrictions on them is not a typical feature or guarantee. Additionally, automatic enrollment in medical benefit programs does not directly relate to the attractiveness of standalone drug plans, which are often selected for their targeted focus on medication coverage without the need for additional medical benefits.