From Elkin Fountain: w19, s, w6, n3, e
Kelbin sells potions and such. For those who reside in Carnage, a majority of their potion needs will be met by Kelbin. You can "ask kelbin special" to see a list of special potions Kelbin can brew.
"ask kelbin rose" - This sends a messenger to pick up a couple of Rose Potions. These are very inexpensive and remove poison.