Itchy, watery eyes
Many things could cause your eyes to itch or fill up with tears from time to time. It could be a mild reaction to springtime pollen. But it might be something more serious like a drug allergy. Take note when you start a new medicine. A reaction could happen right away, or a few days or weeks later.
Breathing changes
Strange changes could be a sign of a severe allergic reaction to a food or a drug. You may notice a sudden wheezing. Or you might just feel like you can’t quite catch your breath. If your breathing changes out of the blue, seek treatment right away. It could be a sign of anaphylaxis, a severe reaction.