This issue of Immunology and Allergy Clinics, edited by Dr. Pascal Demoly, is devoted to Drug Hypersensitivity. Articles in this issue include: Drug allergy diagnosis; Principles of drug allergy management: acute drug reactions, individual preventive measures, desensitization, general preventive measures; Antibiotics allergy; Non-steroidal anti-inflammatory drugs HS; Local and general anesthetics allergy; Radiocontrast media and dyes allergy; Chemotherapeutic agents allergy; Vaccine allergy; Biological agents HS; Anti-epileptic allergy; Iron and Vitamin Allergy; Antiviral drug allergy; Additive allergy; and Unmet needs in drug allergy.