[QUOTE=Sirrahsim;2074933]Even at proper dosages some cold medicines can make people excitable.QUOTE]

This is the case w/my son. He not only becomes excitable, he becomes downright mean. He feels it and can't stop himself, so he's stopped taking sinus medications altogether. Plus, earlier this year when he developed myositis which temporarily paralyzed him, the specialist told him that many cold medications could be a contributing factor in myositis. He showed my son a long list of them that people were advised to stay away from. I took one years ago and got a pain in my left arm that brought me to my knees and I was only in my early 30's then, so I've stayed away from them ever since then. Maybe you should talk to your doctor before taking anything else, half a dose or not. These meds scare me.