Neomycin is one of the drug items in the game.
About
Neomycin is an antibiotic used as a preservative in the EHV-1 vaccine.
Crafting
Users in the Pharmaceutical Sciences stream can craft neomycin at the Workshop. It takes approximately 12 hours (or 6 show rollovers) to craft.
Use
Neomycin is used to craft Foal Protect.