I have no idea how do it these days, anyone knows how? I'm pot master specced and I wanna go elixer spec
http://www.wowwiki.com/Alchemy Scroll down and read "Changing Specializations"
Talk to Lauranna Thar'well in Cenarion Refuge in Zangarmarsh to unlearn potion master, then talk to Lorokeem in Shattrath to learn Elixir master, it costs 150g to unlearn pot master then another 150g to learn elixir master.
I switched! Thanks a lot for the quick response guys