Washington Multistate Pharmacy Jurisprudence MPJE Practice Exam 2025 - Free MPJE Practice Questions and Study Guide

Some OTC drugs may require a 'flammability' warning because they contain alcohol, which has a low flash point and can easily catch fire. It is important to provide a warning for these drugs to prevent potential accidents, especially if they are being used near an open flame or heat source. Options A, C, and D may also have some level of flammability risk, but it is not the primary reason for their warning. Aerosols (option A) can be flammable due to their propellant, but the primary concern is usually their chemical composition or potential for explosion. Gels (option C) may contain a flammable ingredient, but the risk of fire is typically lower compared to liquids containing a high concentration of alcohol. External use only drugs (option D) may still pose a fire risk if they contain flammable ingredients or if they come into contact with a heat source, but it is not the primary concern for their warning label.