What Leptin Is. Leptin is a hormone secreted by adipose tissue (fat cells) that tells you youâre full. (Its opposite hormone is called ghrelin, which tells you youâre hungry. You can remember this because the word ghrelin sounds like a stomach growling.) Because leptin is secreted by fat cells, you produce more leptin as your weight increases.
Epinephrine is the most effective treatment for anaphylaxis, and the shot should be given right away (usually in the thigh). If youâve had an anaphylaxis reaction before, you should carry at least two doses of epinephrine with you at all times.
Unlike other allergic reactions, however, anaphylaxis can kill. Reaction may begin within minutes or even seconds of exposure, and rapidly progress to cause airway constriction, skin and intestinal irritation, and altered heart rhythms. In severe cases, it can result in complete airway obstruction, shock, and death.