depression
"I was prescribed olanzapine as an off-label mood stabiliser for clinical depression. It took away all my positive emotions, leaving me feeling permanently "grey" and essentially soulless. I lost interest in all activities I previously found enjoyable.  In four months of "treatment" I'd gained 4 stone, and couldn't stop eating. Only now am I coming off this, a process which has been extremely difficult due to a resurgence of the condition the medicine was treating. "