The Witcher - Preview @ GameSpy

Also from Gencon and GameSpy comes this preview of The Witcher.  They seem to be using the demo from E3, so much of the territory has been previously covered.  With that in mind, here's a bit on potions:

The game has a rather interesting take on potions. Players have alchemy abilities and can mix their own potions and create new ones by mixing ingredients found in the game. Some potions will give great benefits, in Madjei's demonstration he put together a night vision potion that makes certain situations in the game much easier to navigate. Some potions, however, will have unpredictable or even dangerous effects, so down the hatch and hope for the best. As the Witcher drinks potions, he also develops a level of toxicity that rises the more potions consumed. That provides some strategic choices in deciding just when to use potions.