(p): Slow damaging poison starting with 4, can be cured by all antipoisons. (kp): Slow damaging poison starting with 6, can only be used on spears, can be cured by all antipoisons. (+): Faster than slow damaging poison starting with 4, can be cured by all antipoisons. (s): Faster than slow damaging poison starting with 6, can be cured by all antipoisons.
You got ripped off, and it's your own fault for just believing the person who talked you into it. I sell Weapon Poison(s) very cheap, but shop is closed and I'll only sell if you are lucky to bump into me in game because I'm too busy to deal with all the trades from it.