The 'Homemade Vault 81 Cure' is added as an alternative stimpak recipe at chemistry stations, which can be crafted using a stimpak and molerat meat. It acts as a slightly more potent version of the normal stimpak, cures any molerat diseases you may have, and most importantly CAN'T BE USED ON CHILDREN.

Install with NMM, or place into your data folder then enable with a mod manager.