There is a challenge for using 100 stimpaks, as well as an achievement/trophy for healing 10,000 health with stimpaks.A considerable amount can be purchased from Doctor Usanagi at the New Vegas medical clinic.

With enough Followers fame, unlimited access to the Followers safehouse is granted, where more free stimpaks can be acquired, three at a time. They can be obtained free from Julie Farkas at the Old Mormon Fort once per day with a good reputation with the Followers of the Apocalypse.Cliff Briscoe in Novac almost always has stimpaks (as well as other aid items and skill books) in his inventory for sale.The player character can also occasionally find chemistry sets where they can be made with a sufficient Science skill. Muggy can break down coffee mugs for empty syringes. Simply use the biological research station to turn unused plants into Salient Green, turn this into broc flower and xander root using a hot plate or campfire, and then combine these with empty syringes at a workbench. A large number of stimpaks can be obtained in the add-on Old World Blues with a Science skill of 70 and a Survival skill of 25.The crafting components needed to make a stimpak are the same components needed when asking Myron to craft stimpaks in Fallout 2.Stimpaks can be bought at Sierra Madre vending machines for 25 Sierra Madre chips once the relevant Vending machine code is found at the Villa clinic.Five are added to the Courier's inventory with the Courier's Stash 's Classic Pack.Four in REPCONN headquarters's office 2nd floor.The items can be found all over the Mojave Wasteland, usually in medical facilities and first aid boxes.

Stimpak fallout shelter wiki