back pain
"The first 3 days I took Tramadol Hcl tablets, 1/2 tablet in the morning, and the other half at night, as per my doctor's orders.  They were 50mg. tablets.  Had a slight adverse reaction the second time they were prescribed for me, so had to go slow. Most of the pain disappeared for those 3 days.  On the fourth day, I took my usual dose-1/2 of a 50mg. tablet with a full glass of water, as usual.  Within a few hours, I began to experience some of the side effects listed: nausea, dizziness, diarrhea, headaches, itchiness, upset stomach, and lightheadedness.  I also had a few extra side effects: constant belching, acid reflux, and shortness of breath.  These events lasted for several hours."