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  1. Eosinophilic esophagitis - Symptoms and causes - Mayo Clinic

    Jul 2, 2024 · Learn more about the causes and treatment of eosinophilic esophagitis — a digestive disease caused by an allergic reaction.

  2. Alpha-gal syndrome - Symptoms and causes - Mayo Clinic

    Aug 8, 2025 · Symptoms An alpha-gal allergic reaction often starts about 2 to 6 hours after you eat something with the alpha-gal molecule. Symptoms may be mild or lead to serious illness, …

  3. Hydroxyzine (oral route) - Side effects & dosage - Mayo Clinic

    Dec 1, 2025 · This medicine is also used to relieve symptoms of allergic conditions (eg, chronic urticaria and atopic and contact dermatoses). Hydroxyzine is an antihistamine. It works by …

  4. Allergies - Symptoms and causes - Mayo Clinic

    Aug 24, 2024 · Prevention Preventing allergic reactions depends on the type of allergy you have. General measures include the following: Stay away from known triggers. Do this even if you …

  5. Omeprazole (oral route) - Side effects & dosage - Mayo Clinic

    Dec 1, 2025 · Omeprazole may cause a serious type of allergic reaction when used in patients with conditions treated with antibiotics. Call your doctor right away if you or your child has …

  6. 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 …

  7. Food allergy - Symptoms and causes - Mayo Clinic

    Aug 30, 2024 · Overview Food allergy is an immune system reaction that happens soon after eating a certain food. Even a tiny amount of the allergy-causing food can trigger symptoms …

  8. Clindamycin (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 …

  9. Milk allergy - Symptoms & causes - Mayo Clinic

    Sep 19, 2025 · An allergic reaction usually happens soon after you or your child consumes milk. Symptoms of milk allergy range from mild to severe and can include wheezing, vomiting, hives …

  10. Pink eye (conjunctivitis) - Symptoms and causes - Mayo Clinic

    Jan 10, 2025 · Pink eye is most often caused by a viral infection. It also can be caused by a bacterial infection, an allergic reaction or — in babies — an incompletely opened tear duct. …