You can start this after the tutorial in a fresh new game, in New Game Plus, or at any point. Recently, the developers updated the game, providing plenty of chemicals to craft meds. With this approach, you’ll be well-prepared before even entering your first enclosure.
Zoochosis: How to Get Infinite Chemicals
If you are starting from new game plus+ grab the bottles from the first med cabinet in the hub (if you aren’t starting fresh and just need more vials ignore this).
Spam making tranquilizer darts use all you have so you will get a refill from doc.
After that DON’T pick up the darts go get the refill then go back and pick up one of the darts you made you’ll notice after you pick up one dart you get another message from doc for another refill.
Profit: Rinse and repeat you can do this over and over craft darts, get refill, pick up dart , get refill and once you run out of darts and refills just make more tranquilizer darts and just do it to your little heart’s content.
If you interact with the computer at any point during the loop you will break the glitch but all you gotta do is just spam more tranquilizer darts until you get another refill message from doc.