Poison Riddle

[Madoness]

Just a fun teaser to test logic. Those who get the answer, please do not post it here. It should be easy to get anyways.

In a far away land, it was known that if you drank poison, the only way to save yourself is to drink a stronger poison, which neutralizes the weaker poison. The king that ruled the land wanted to make sure that he possessed the strongest poison in the kingdom, in order to ensure his survival, in any situation. So the king called the kingdom's pharmacist and the kingdom's treasurer, he gave each a week to make the strongest poison. Then, each would drink the other one's poison, then his own, and the one that will survive, will be the one that had the stronger poison.
The pharmacist went straight to work, but the treasurer knew he had no chance, for the pharmacist was much more experienced in this field, so instead, he made up a plan to survive and make sure the pharmacist dies. On the last day the pharmacist suddenly realized that the treasurer would know he had no chance, so he must have a plan. After a little thought, the pharmacist realized what the treasurer's plan must be, and he concocted a counter plan, to make sure he survives and the treasurer dies. When the time came, the king summoned both of them. They drank the poisons as planned, and the treasurer died, the pharmacist survived, and the king didn't get what he wanted.
What exactly happened there?

 

[Reverse Transcriptase]

Heh, the first time I heard this riddle it was about a Knight and a Dragon, and wells of poison. (The Dragon was the pharmacist, since the dragon was able to control the 7th well, which was at the top of the mountain-island.)

It's good. We could also use the spoilers tool to hide our answers & compare.

 

[Artifice Orisit]

Spoiler

The treasurer secretly poisoned himself before drinking the pharmacist's poison (thus making it a cure) then gave the pharmacist water to drink, knowing that the pharmacist would then have to drink his own poison, however the pharmacist knew this was going to happen so he also secretly poisoned himself with a weak poison before the competition, then hired an assassin to kill the treasurer.

Yeah, I know it's wrong.

 

[wadlez]

Spoiler

The treasurer knew his potion would be weaker so he drank his before the pharmacists. The pharmacist knew he was going to do this so he made him a really weak poison, weaker than the treasurers. He then made sure to drink his first before the treasurers.