Who made the hemlock drink?

The hemlock drink is most famously associated with the philosopher Socrates, who was sentenced to death in 399 BC for corrupting the youth of Athens and impiety. He was given a potion made from the hemlock plant, specifically its toxic alkaloids, as a means of execution. Socrates accepted the drink calmly, discussing philosophical matters with his friends until his death. The event is well-documented by his student Plato in dialogues such as the "Phaedo."