5 Dose Ethira's Poison Antidote  

 

Yes, this is Alchemy. Been in the game a long time. Made by combining Lady's Mantle and Hyssop. Cost is around 7 plat to make and is trivial at 36.

Although it doesn't come in a 5 charge bottle, you can go to Kaesora and easily get a 1 charge potion of Ebolish Poison. It's called strathbone anti-venom. Drops off of strathbone healers. Drops 1 in about every 2 or 3 kills. Better than counteract. If you have room and are going on a raid with poison users, just get a couple of these. I got 10, wasn't even looking for them, and kept 2 just in case.

Not new either. Simply not normally sold because the cost to make it is higher than you were offered it for from the vendor. In other words, clearly not worth producing other than to practice the skill.

All multiple doses potions are made via alchemy (the shaman built 5 or 10 single charge potions) and everyone can combine them in a grizzly bag to obtain one 5 or 10 charges potion.

Surely a new alchemy potion or, as the thurg gate potion, use another skill (if so, another slap to the shaman community who had to wait more than 1 year to have alchemy fixed).

PS : maybe not a new potion but an old one never discovered. As now that combining items don't eat reagents anymore, some shamans must try all the combos with the 30+ differents regs avaible :).