What are common signs of an allergic reaction to medication?

The identification of common signs of an allergic reaction to medication is essential for timely intervention and safety. The correct answer emphasizes symptoms that are typically associated with allergic reactions, such as rash, itching, swelling, and trouble breathing.

These symptoms arise due to the body's immune response to a foreign substance, in this case, a medication. A rash or hives may occur as the skin reacts, while itching can signal irritation from histamine release. Swelling, particularly of the face, lips, or throat, can develop and poses a risk of airway obstruction, leading to trouble breathing. This collection of symptoms is consistent with what is known as anaphylaxis or a less severe allergic reaction, underscoring the gravity of recognizing these signs promptly.

In contrast, the other options list symptoms that may coincide with various conditions but are not specifically indicative of allergic reactions. For instance, fever and headache are more closely related to infections or other illnesses, while symptoms like increased heart rate and dizziness might suggest cardiovascular issues or dehydration rather than an allergic response. Abdominal pain and diarrhea are commonly associated with gastrointestinal disturbances and are not hallmark signs of medication allergies. Hence, the answer highlighting rash, itching, swelling, and trouble breathing accurately reflects the typical manifestations of an allergic