A compatriot of mine and myself are in a disagreement about the way Potion of Poison works. He is a bit of a rules lawyer, and I trust his judgement, but I don't agree with his assessment of this item.
He believes: Drink the potion, take 3d6 damage, roll the save. On a success you are not poisoned and take no further damage. Fail and you take 3d6 damage each turn until you make the save. Once the save is successful the damage is reduced by 1d6 each turn until it is Zero.
Acredito: Drink the potion, take 3d6 damage, roll the save. Succeed and the damage is reduced by 1d6 each turn until it is Zero. Fail and you take 3d6 damage each turn until you succeed on the save, then the damage is reduced by 1d6 until it is Zero.
It's a minor difference but a major effect. We've read and re-read the description, coming to same conflict.
How does a Potion of Poison actually function?