depression
"I used to take 75mg 2x a day and quit. I felt like it was not working and had terrible side effects. 
After 6 months of not taking medications, and situations got hard to cope, I asked to be put back on. 
The second time around, the 75mg had me very nervous, anxious, dizzy and "dopey". The doctors said that the immediate release is harsh on your system and switched me to 150 mg XL. And just 3 days in to the new dose, I do not have such harsh side effects. The only side effects I have is no appetite, dry mouth and vivid dreams. 
Overall, I am no longer having obsessive negative thoughts (which triggered my anxiety), so I'm overall not as anxious or having panic attacks. I feel more motivated and energetic, but its only 3 days in on this dose."