Gabapentin
"70 yrs old. Have suffered from depression-bipolar since 17. Have been treated with tens of medications to no avail, except lithium for 43 yrs which no longer works. 4 yrs ago I was treated with Gabapentin, which seemed to decrease the depression already after initial dose of 300mg. Increased to 3*300mg to which I reacted well until general anaesthetic in dec 2015 for operation threw me into a deep depression. Any info on effect of anaesthetic on depression and any antidote?"