major depressive disorde
"I was put on 15mg of Mirtazapine about a month ago and it was the best decision ever. I've been very depressed and underweight (unintentionally due to stress and high metabolism) almost all my life. I went to my doctor at the end of my rope, having been off any type of anti-depressants, anti-anxiety etc for 5 years - I told him that all the pervious SSRIs and SNRIs I'd been on hadn't worked because they made me both suicidal and lose more weight (I generally have a BMI of 15-17 max). He recommended this and if it weren't for me giving medicinal treatment one more shot, I wouldn't be sleeping, eating or in the process of finally getting my degree and my own place! 
The only downside was that in the first 2 weeks I had some dry mouth/tiredness."