I am 33 and have been on Levoxyl 50 for 6 months for slight Hypothyroid. It seemed to bring me out of the fatigue at first, but now suffering from severe headaches, severe memory loss, insomnia and increased appetite. I just had a dr.'s visit for my symptoms and we did not even discuss the possibility of Levoxyl being the culprit. He suggested that I seek counseling for stress. I am taking myself off the medication and will find a thyroid specialist. KD