Doubleyolkeggs

John gets a second chance at life, going back to the time before "The Gate to Another World" appeared. Betrayed in his past life as a pharmacist, he decides he can't trust anyone anymore. So, he opts for a hidden profession, becoming a poison master disguised as a regular pharmacist to everyone else.
To the other awakened ones, John is just your run-of-the-mill potion maker. 
Little do they know, every healing potion he brews is laced with deadly poison.
"John, heal me quick... Fuck! John, what did you do to me? Why have I turned bald?"
"John!!Why did my penis turn into a mushroom after drinking your potion?"
"You guys dare to drink John's healing potions? I saw with my own eyes last time, he threw a bottle of his healing potion and it directly stank a Corrupt Lord to death!"
"And that's nothing! I saw a toxic serpent bite John, and guess what? The serpent got poisoned to death by him!"
John sneered at the collapsed crowd, "I've said it before, though my potions are free, they come with some minor side effects. Want to get rid of the side effects? That'll cost extra!"
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Supreme therapist：My healing potions can even poison the gods

Leo suddenly stood up from his seat, pointing at those who had just been mocking and openly cursed, "Were you the ones barking like dogs just now? A bunch of blind fools! Hurry up and apologize to the Death Plague Doctor!"

Leo, clearly now a staunch fan of the Death Plague Doctor.

As the captain of the Azure Squad, he had reached level 5. He was not someone these people could afford to provoke.

The faces of those few turned sour, and they quickly bowed their heads pretending to eat, daring not to speak any further.

Then someone shouted towards the medical team's pharmacists, "Hey, you pharmacists better go and take apprenticeship. Maybe you'll be able to fight in the future instead of just freeloading every day."

The pharmacists eating together rolled their eyes at him speechlessly.

Killing the Demon Tree, Rescuing the Trio