Definitely be very careful about anything that causes the tongue to swell. My son had that problem and it was the one night I decided to go home instead of staying at my son's house. He awoke in the middle of the night and his tongue was so swollen he couldn't talk or breathe well. He managed to call my daughter (a police officer) and she could tell who it was from the way he was making guttural and choking sounds that he was in trouble. She came right away and took him to the emergency room. They gave him a Benedryl shot and he was ok after that. The doctors told him it was a reaction to medication. After that he kept Benedryl on hand in case of another episode. Make sure the doctor is aware of what's happening.