I know that every potion in The Witcher 2 has a "toxicity", but both the manual and the game provide less than adequate explanations of what toxicity is, and how it works.
For instance, much of the latter half of the Alchemist tree deals with effects 'while intoxicated'. What does it mean to become 'intoxicated', and what are its effects?
What do the green and red bars on the potion toxicity meter mean? In gameplay, I haven't noticed any apparent effect from using past the green, and I haven't dared to toxic-ify myself into the red.
Best Answer
Being intoxicated is not like in The Witcher, where you used to start shaking and lose control of Geralt.
Here, intoxication level only limits the amount of potions you can pour down.
Some talents allow you, so to speak, to "spread this poison" to your enemies.
They are the type "+xx to yyy .. while intoxicated"
Excerpt from an interview with Tomasz Gop: