You mainly get these berries on Jungle Ferns and if you are able to get 5 then you can craft Narcotics in the Mortar And Pastle, Thanks For Reading :D

Tip: if your struggling to tame a pteradon or any creatures who stay unconscious for a few seconds then you can make some Narcotics and feed them to keep its torpor up, which keeps it unconscious for longer periods of tame depending on the amount you feed the creature, great for starters who are trying to tame Pteradons!

If you need narco berry's your shoulder grow them or some good gatherers for them are the iguanodon and the parasaur they both need a saddle in order to harvest them and you usually get alot and after about 5 to 10 minutes you'll have hundreds in order to grow you need seeds and crop plots place them down outside when it rains they grow and you'll have the berries

Growing these are ez all you need is the iguanadon tap it for seeds (you have to put the narcoberry in the iguanadion) get feces and water from poles or rain then wait then you have narco Berrys ;)

I once thought it was a good idea to eat these….