ibromyalgia
"Cyclobenzaprine actually CAUSES me to feel joint pain plus overall fatigue, far beyond what fibromyalgia does. A few days after taking this, I noticed feeling depression out of nowhere, getting short of breath quickly (I'm fairly young & work out 5-6 days a week for 60-70 minutes a day, so this abnormal for me), my chest felt tight, my body was stiff as a board. I dropped this & just one day later I felt completely back to my normal self."