Why must medications be stored according to labeled conditions (temperature, light, moisture)?

• A. To maintain potency, safety, and prevent spoilage or degradation
• B. To save energy
• C. To keep the packaging looking good
• D. To meet daily quota

Answer: (A)

Storing medications under the labeled conditions protects their potency and safety. Active ingredients can break down when exposed to heat, moisture, or light, which can reduce effectiveness or create harmful byproducts. Light can cause photodegradation, moisture can promote hydrolysis or microbial growth, and temperature extremes can alter chemical stability. The storage instructions come from stability testing and are chosen to keep the medicine effective and safe until its expiration. Some drugs even require refrigeration or protection from light to maintain their effectiveness. Other options don’t address drug stability or patient safety, so they don’t explain why labeling matters.