Under what circumstance can you administer a medication for a pre-existing condition?

Administering a medication for a pre-existing condition is appropriate for over-the-counter topical medications because these products are generally designed for self-treatment of minor conditions, such as skin irritations or mild pain. Over-the-counter medications are specifically formulated for safe use without a prescription, allowing individuals to manage certain health issues directly.

Topical medications can be applied locally, which minimizes systemic absorption and potential side effects, making them suitable for non-professionals to administer under specific circumstances. Proper understanding of the indications, usage, and potential side effects of these medications is essential.

In contrast, the other choices lack the necessary context or guidelines typically required for safe medication administration. For example, relying solely on a patient's request or the presence of a pharmacy label without further assessment could lead to complications, as proper medical oversight and evaluation are crucial.