Biologic Drug Allergy

A biologic drug allergy occurs when the body's immune system mistakenly identifies a biologic medication—often made from living organisms—as harmful. Biologics are used to treat conditions like autoimmune diseases and certain cancers. When someone is allergic, their body reacts negatively, potentially causing symptoms like rashes, swelling, or difficulty breathing. This happens because the immune system produces antibodies against the drug, leading to an allergic response. If you suspect an allergy to a biologic drug, it's important to discuss it with a healthcare provider for proper evaluation and management.