What type of dosage form is most likely to be administered via injection?

The administration of medications via injection is predominantly associated with liquid dosage forms. Liquid formulations allow for the precise measurement of doses and enable the drug to be delivered directly into the bloodstream or targeted tissues, providing a rapid onset of action. This is particularly effective for medications that need to bypass the gastrointestinal tract or that are poorly absorbed when taken orally.

Liquid dosage forms can include solutions, suspensions, and emulsions, which can be easily prepared for sterile conditions necessary for injections. They also facilitate the administration of larger volumes compared to solid forms, which may not dissolve quickly or at all in body fluids.

In contrast, solid dosage forms, such as tablets or capsules, require dissolution before absorption and are unsuitable for direct injection. Gaseous forms are also impractical and not commonly used for injection, as they lack the necessary characteristics for delivering a consistent and controlled dose. Semi-solid forms, such as creams or gels, are typically applied topically rather than injected, as their consistency is not conducive to intramuscular or intravenous administration.

Overall, the use of liquid formulations for injectable drugs is essential for ensuring effective, safe, and rapid pharmacological effects in clinical practice.