anxiety
"On Neurontin (300 mg 3x a day) for nerve pain.  It's fascinating to read polar opposite experiences with this drug - depression/anxiety reduction, seizures/anti-seizure, pain/pain reduction etc. Apparently, too tight this will loosen you, too loose this will unravel you. I guess I was "too tight", this has been marvellous for reducing pain as well as anxiety.  My only discomfort is that if I don't take it I go into a tailspin within a day or two, very (very) irritable, hyper-anxious and insomniac.  I also find that increasing the dosage is, well, a little TOO pleasant, it makes it tempting to abuse it.  Oh, one thing, I can see why this is called "GABApentin", if I take all 900 mg before bedtime I wake up chattering like a monkey.  :)"