Which of the following is NOT listed as a common route of medication administration in the material?

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

Answer: (D)

A primary idea to grasp is that not all routes are treated as standard, widely listed options. In many pharmacology materials, the common routes you’ll see emphasized for reaching systemic circulation are oral, intravenous, and inhalation. Intraocular administration, by contrast, is a specialized, localized method used mainly for eye conditions rather than general systemic therapy, so it isn’t typically listed among the common routes. That’s why this option stands out as not being listed as a common route. The other options—oral, intravenous, and inhalation—are routinely encountered because they cover the most common ways drugs are delivered for systemic or rapid local effect.