Question

Doctors often use certain medications to treat infections. A few people have a reaction to some of these medications, such as itching, swelling, or trouble breathing. This is an example of *

Answer 1

An allergic reaction occurs when the immune system reacts to a harmless antigen called an allergen. Some people may have allergic reactions to certain medications, experiencing symptoms like itching, swelling, or difficulty breathing.

Step-by-step explanation:

An allergic reaction is an immune response to a harmless antigen called an allergen. Some people may have a reaction to certain medications, resulting in symptoms such as itching, swelling, or trouble breathing. These symptoms are part of an allergic response and are caused by the immune system's inflammatory reaction to the medication.

For example, someone with a penicillin allergy may experience itching, hives, or difficulty breathing after taking penicillin. It is important for doctors to be aware of a patient's allergies before prescribing medications to avoid such reactions.

It's worth noting that allergies can vary in severity, with some cases leading to life-threatening reactions like anaphylaxis. Prompt medical attention is necessary in such cases.