If your doctor has prescribed an allergy kit, always keep it with you. It contains a syringe of epinephrine and antihistamine tablets. Your doctor or pharmacist will teach you how to give yourself a shot. Be sure to check the expiration dates on the medicines, and replace the medicines as needed.
You should also wear a medical alert bracelet or other jewelry that lists your food allergies. You can order medical alert jewelry through most drugstores or on the Internet.