My son is fifteen years old and was taking Mucinex DM Max Strength to help with bronchitis as he runs track and had a track meet coming up. He is 5'11" and weighs 160 lbs. So, the doctor gave him antibiotics and he was to take Mucinex DM as well as an inhaler for five days. By the third day my son's school called and informed me that he was hallucinating and weak. He also hadn't eaten anything that day and his blood pressure was 180/100. We immediately brought him to the emergency room to get him checked. He has not taken the Mucinex in over 48 hours now and is just starting to feel better (less high). I took him off Mucinex immediately but didn't realize that it could cause hallucinations. I never would have given it to him. So, I am glad that others reported this and I will never, ever buy that product again. I thank God because it could have turned out worse than it did.