What does sublingual administration involve?

Sublingual administration involves placing medication under the tongue, where it dissolves and is absorbed directly into the bloodstream through the mucous membranes. This method is used for its rapid onset of action since the medication bypasses the digestive system and liver metabolism, allowing for quicker therapeutic effects. Sublingual administration is often utilized for medications that require fast relief or those that are poorly absorbed when taken orally. The other options pertain to different routes of medication administration, such as rectal, topical, or intravenous, which do not involve the sublingual route at all.