Which route indicates intravenous administration?

Which route indicates intravenous administration?

• A. Intravenous
• B. Intramuscular(ly)
• C. Subcutaneous(ly)
• D. Per os (by mouth)

Answer: (A)

Understanding routes of administration: intravenous means delivered directly into a vein, so the drug enters the bloodstream immediately. This yields the fastest, most predictable onset because it bypasses absorption from other tissues or the GI tract. Intramuscular is into a muscle, requiring absorption from the tissue and often slower and more variable. Subcutaneous is into the fatty layer under the skin, also with slower, variable absorption. Per os means by mouth, requiring absorption through the GI tract and possible first-pass metabolism before reaching circulation. So, the route described as into a vein is the one that indicates intravenous administration.

Understanding routes of administration: intravenous means delivered directly into a vein, so the drug enters the bloodstream immediately. This yields the fastest, most predictable onset because it bypasses absorption from other tissues or the GI tract. Intramuscular is into a muscle, requiring absorption from the tissue and often slower and more variable. Subcutaneous is into the fatty layer under the skin, also with slower, variable absorption. Per os means by mouth, requiring absorption through the GI tract and possible first-pass metabolism before reaching circulation. So, the route described as into a vein is the one that indicates intravenous administration.