question: I am a 39 yo female who is 5 0 and weight 110 lbs who recently took a dose of Sudafed12 hr. extended release for the first time. When I went to sleep, I noted a strange feeling of disorientation, heart palpitations, and possible hallucinations. Needless to say, I do not like the side effects I am getting. I am tired and want to go to bed. How long will I expect to feel this way?