Ultram ER and severe back pain

I just use Ultram er 200m one time in my life, last night for my back pain ,I am very happy because the severe back pain I had getaway, but now since this morning went I wake up I fell to bad with nausea, dizziness , itching, vomiting I can't drink even water because i need to go and throwout. I do not think I will continue with this medication. Just one pill was an off for me to discontinue the medication.

I have been taking Ultram 50mg 3 times daily for almost 8 years. I had severe back pain that extended down my left leg. I went to a Neurologist and he performed back surgery. I did quite well for about 3 months and then was experiencing the same problems. He then prescribed Ultram ER and it has worked great. The only side affects I have recognized have been sleeplessness, hot flashes, nausea that goes away in about 1 hour after taking it, and super energy. The benefits far outway the side affects. My 34 year old brother was prescribed the 50 mg. tablets and he had to be transported to the emergency room because of a seizure. Needless to say he was advised not to ever take another pill.