I recently completed a 28 day stay at a detox and rehab facility due to years of alcohol. Yesterday I followed through with a visit with my family doctor. She read the medical discharge notes on my rehab sign-out document. At detox, I experienced a severe allergic reaction to something as I had a rash around my neck and upper chest along with a "prickly" feeling around my stomach. My face was red and swollen and I had trouble breathing. Due to sleep apnea discovered at rehab and suggested blood tests from a friend my doctor gave me the forms necessary for blood work. On each form the word "seconal" was listed under allergies. I have no idea what that means or the causes that pertain to this allergy.