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  1. Allergies - Symptoms and causes - Mayo Clinic

    Aug 24, 2024 · Allergic reactions vary from person to person. They can range from minor irritation to a life-threatening emergency called anaphylaxis. While most allergies can't be cured, treatments can …

  2. Food allergy - Symptoms and causes - Mayo Clinic

    Aug 30, 2024 · Food intolerance and other reactions A food intolerance or a reaction to another substance you ate may cause the same symptoms as a food allergy does — such as nausea, …

  3. Drug allergy - Symptoms and causes - Mayo Clinic

    Nov 9, 2024 · Overview A drug allergy is the reaction of the immune system to a medicine. Any medicine — over-the-counter, prescription or herbal — can trigger a drug allergy. However, a drug allergy is …

  4. Penicillin allergy - Diagnosis & treatment - Mayo Clinic

    Sep 20, 2025 · Understand the importance of an accurate diagnosis for this type of allergy and the best practices for antibiotic treatment.

  5. Monosodium glutamate, also called MSG: Is it harmful? - Mayo Clinic

    Monosodium glutamate, also called MSG, is used to make food taste better. Glutamate is a form of the amino acid glutamic acid. Both are naturally in food such as cheese, tomatoes, mushrooms and …

  6. Pneumococcal 20-valent conjugate vaccine (intramuscular route)

    Mar 1, 2025 · Description Pneumococcal 20-valent conjugate vaccine is an active immunizing agent used to prevent infection caused by certain types of pneumococcal bacteria (Streptococcus …

  7. Anaphylaxis - Symptoms & causes - Mayo Clinic

    Apr 16, 2025 · Anaphylaxis is a severe, potentially life-threatening allergic reaction. It can occur within seconds or minutes of exposure to something you're allergic to, such as peanuts or bee stings. …

  8. Lisinopril (oral route) - Side effects & dosage - Mayo Clinic

    Dec 1, 2025 · This medicine may cause serious types of allergic reactions, including anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention.

  9. Cephalexin (oral route) - Side effects & dosage - Mayo Clinic

    Dec 1, 2025 · Serious allergic reactions can occur with this medicine. Check with your doctor right away if you have chest pain, blistering, peeling, or loose skin, red skin lesions, large, hive-like swelling on …

  10. Levofloxacin (oral route) - Side effects & dosage - Mayo Clinic

    Dec 1, 2025 · This medicine may cause serious allergic reactions, including anaphylaxis, which can be life-threatening and require immediate medical attention. Call your doctor right away if you have a …