Pharmacology for Radiology Practice Test 2026 – Complete Exam Prep

Most intravenous medications are prepared in an aqueous solution because these solutions consist primarily of water as the solvent. Water is an excellent medium for dissolving a wide variety of pharmaceutical compounds, allowing for effective delivery of active ingredients into the bloodstream. The use of an aqueous solution ensures that the medication can be administered rapidly and absorbed efficiently, providing the desired therapeutic effect in a timely manner.

Aqueous solutions also allow for adjustments in pH and osmolarity, which can be critical in ensuring compatibility with the human body, minimizing the risk of adverse reactions, and maximizing the stability of the drug during storage and administration. Furthermore, intravenous medications need to be isotonic to prevent complications such as phlebitis or hemolysis, and aqueous solutions can be easily formulated to meet these requirements.

In contrast, solid, gaseous, or paste forms are not suitable for intravenous administration due to their physical properties, which do not allow them to be effectively infused into the bloodstream.