HELP!!! What do do for a peanut allergic reaction?

My friend just had a peanut reaction to something we ate, its not bad enough for an epi-pen, but its really bad. We're home alone right now, and neither of his parents will answer their cells. He's in alot of pain right now, and i googled what do do, but i cant get any results. What do I do??? Link if you can please help!!!