The abbreviation "sl" refers to a medication administered in which manner?

The abbreviation "sl" stands for "sublingually," which refers to the method of administering medication under the tongue. This route allows for rapid absorption into the bloodstream through the mucous membranes, bypassing the digestive system and liver metabolism. Sublingual administration can be particularly beneficial for medications that require a quick onset of action or for those that may be poorly absorbed when taken orally.

In contrast, the other options denote different routes of administration that do not align with the abbreviation "sl." Intramuscularly involves injecting medication into a muscle, vaginally pertains to medications administered in the vaginal area, and orally means taking drugs through the mouth and swallowing them. Each of these methods has distinct characteristics and uses, making sublingual administration unique and effective for certain types of medications.