Which is a disadvantage of solutions?

• A. Easy to package
• B. Taste masking is always good
• C. Less stable
• D. High stability

Answer: (C)

The key idea here is how stable a drug is when it’s in a liquid form. In solutions, the drug is fully exposed to water and the surrounding environment, so chemical reactions can happen continuously over time. This makes drugs in solution more prone to degradation than in solid form. Factors like temperature, light, pH, and the presence of oxygen or other reactive species can drive hydrolysis, oxidation, or photolysis, speeding up loss of potency. Microbial growth is another concern in liquids, which is why preservatives and strict storage conditions are often needed.

Because of these stability issues, a disadvantage of solutions is that they typically have shorter shelf lives and stricter storage requirements compared with solid dosage forms. That’s why the option describing reduced stability is the correct one. In contrast, easy packaging and high stability would be advantages, and taste masking, while important, is not inherently better in all liquid formulations.