major depressive disorde
"This is the ONLY antidepressant that has A) worked for me and B) not caused weight gain. Yes, its expensive. Yes, it causes horrible nausea for the first few weeks.  I've been on it for several months now, and unfortunately I still get slightly nauseous every morning when I take (with or without food).  But its been completely worth it for me. My depression no longer controls my life or causes me to miss work or school. 

My advice: try it if you can afford it. Soldier through the initial week or so of nausea. Give it a chance and it might just be your miracle drug - it was for me. Mild nausea for 20 minutes every morning is a small price to pay for an antidepressant that truly works. 9/10 only due to price and nausea."