Does not require Cure Poison to learn. Although functionally better in every way, Abolish Poison does not remove Cure Poison from the spellbook.
Tips and tactics
Can be useful for getting rid of poisons that stack in higher level areas.
Try to keep up Abolish Poison constantly versus Rogues, and as much as possible versus Hunters. It is always the last-applied poison that is dispelled, so advanced PvPers try to cover a dangerous venom like Viper Sting with a minor venom like Snake Trap.
Patch 3.1.0 (14-Apr-2009): Now ticks every 3 sec, up from every 2. Now lasts 12 sec., up from 8.