I am not sure about this Tecfidera...I started the lower dose this past Saturday morning. Today, my head has been hurting since early afternoon and my ears are ringing louder than normal constantly. I feel a little airheaded (not dizzy, not light-headed), just completely different and not liking it at all. I think I will call my neuro in the morning, just so he is aware of what is going on. I just hope to be able to sleep with all this noise in my ears...lol