I was golfing with a friend last week and after an hour or so, his lip started to swell. He thought it might have been an insect bite. By the end of the round, it really swelled up and even down to his cheek.
He went to the ER and they gave him a steroid shot and antihistomine. He went home but the next day, he felt trouble swallowing, so went back to the ER.
They surmised that the Lisinoprol he had been on for 4 years had reacted badly with him all of a sudden!!
Just thought I would pass on this piece of information.