If a licensee maintains an epinephrine injector, which of the following must also be available?

The correct answer is that antihistamines must also be available if a licensee maintains an epinephrine injector.

In situations where an epinephrine injector is used, such as an allergic reaction, it is often appropriate to have antihistamines on hand as well. While epinephrine acts quickly to reverse severe allergic reactions, antihistamines can further assist in managing symptoms, especially in cases of mild to moderate allergic reactions or as a follow-up treatment. This combination allows for a more comprehensive approach to patient care in emergency situations involving allergies.

Other options, while they may be useful in certain contexts, do not serve the same immediate purpose. A blood pressure monitor, for instance, is important for monitoring cardiovascular stability but does not directly address allergic reactions. A first aid kit is generally beneficial for a variety of medical emergencies, but it is not specifically linked to the management of severe allergic responses like antihistamines are. A prescription pad is necessary for various medications but is not relevant in the context of immediate treatment of allergic reactions. Thus, having antihistamines available alongside an epinephrine injector is crucial for optimal patient care during allergic emergencies.