depression
"I found this drug to be very useful for pain. I have crohns disease, degenerative disc disease, migraines,  bipolar disorder , ptsd, anxiety disorder. I take tramadol 3 pills a day. 150mg total. The only thing i dont like is when i skip doses i get awful side effects like a buzzing or vibration in my head. So i am unable to skip days of taking it or i feel very awful."