Which of the following is NOT a valid administration route for spirits?

• A. Oral
• B. Topical
• C. Inhalation
• D. Intravenous

Answer: (D)

Spirits are volatile aromatic liquids that are typically prepared in an alcohol base and designed for routes that avoid injecting substances into the bloodstream. They are well suited for oral use, topical application, or inhalation of vapors because these routes use the liquid in a way that respects its composition and volatility. Intravenous administration, on the other hand, is not valid for spirits because IV formulations must be sterile, isotonic, non-irritating, and free of particulates. A mixture that contains ethanol and essential oils is neither sterile nor isotonic and can cause severe irritation, vein damage, systemic toxicity, and potentially dangerous complications such as embolism if introduced directly into the bloodstream. Therefore, injecting spirits is not appropriate.