Question 73

Room temperature at 15°C to 30°C (59°F to 86°F) is the most appropriate long-term storage temperature range for promethazine suppositories.

Storing promethazine suppositories at room temperature within the range of 15°C to 30°C (59°F to 86°F) ensures their stability and efficacy over time. This temperature range is commonly recommended for many pharmaceutical products, including suppositories.

A) Freezer at -20°C to -10°C (-4°F to 14°F)

Storing promethazine suppositories in the freezer may lead to degradation or alteration of the formulation. Low temperatures can cause changes in the physical properties of the suppository, potentially compromising its effectiveness and making it unsuitable for use.

B) Refrigerator, at 2°C to 8°C (36°F to 46°F)

While refrigeration can help preserve some medications, it is not the optimal storage condition for promethazine suppositories. Storing them at such low temperatures could result in condensation and moisture accumulation, which can adversely affect the suppository's formulation and performance.

C) Room temperature at 15°C to 30°C (59°F to 86°F)

This option is the recommended storage condition for promethazine suppositories, as it maintains the integrity of the product without the risks associated with extreme temperatures. The specified range allows for better stability and consistent therapeutic effects.

D) Warm, at 30°C to 40°C (86°F to 104°F)

Storing promethazine suppositories at elevated temperatures could lead to melting or degradation of the product. Such conditions can compromise the delivery system of the suppository, resulting in reduced efficacy and potential safety concerns.

Conclusion

The recommended storage temperature range of 15°C to 30°C (59°F to 86°F) for promethazine suppositories ensures their stability and effectiveness. Options A, B, and D present conditions that either compromise the product’s integrity or are not suitable for long-term storage, making C the definitive correct choice.