Hello, My son is 11. He recently hurt is back and he was given Tylenol with Codeine. He took it for 3 days Last dose was yesterday morning. he has been complaining about being nauseous, headache, he is very pale and tired, loss of appetite, and having night mares where is very disoriented. He has NO fever, but was also sick last week with a cold. I am wondering if all these symptoms have to do with the codeine he is on, or could this be more serious to where I need to have him seen by his Dr.