Which is the first sign of an allergic reaction to a medication?

Which is the first sign of an allergic reaction to a medication?

• A. Urticaria (hives) or itching.
• B. Nausea.
• C. Chest pain.
• D. Dizziness.

Answer: (A)

The earliest clue that a patient is having an allergic reaction to a medication is a skin-related response—ur ticaria (hives) or itching. This happens quickly as histamine is released and causes raised, itchy welts on the skin. Nausea, chest pain, or dizziness can occur with drug reactions too, but they are not the typical first sign of an allergy. If hives or itching appear, stop the medication if possible, monitor the patient closely, and be prepared to escalate care if symptoms progress toward airway involvement or anaphylaxis.

The earliest clue that a patient is having an allergic reaction to a medication is a skin-related response—ur ticaria (hives) or itching. This happens quickly as histamine is released and causes raised, itchy welts on the skin. Nausea, chest pain, or dizziness can occur with drug reactions too, but they are not the typical first sign of an allergy. If hives or itching appear, stop the medication if possible, monitor the patient closely, and be prepared to escalate care if symptoms progress toward airway involvement or anaphylaxis.