My Son Was Diagnosed With Flu And Pneumonia. He Was

My son was diagnosed with flu and pneumonia. He was prescribed clarithromycn 500 mg. He is 21. He is taking Tylenol for fever.just took temp and it is 101.1..how often can he take the Tylenol until fever is down? Can he take otc Medes for the flu symptoms or NyQuil? Should we run a humidifier since he has pneumonia