This guide list 100 plus most used controlled substances in the medical field ranging from CII-CV picked from the DEA list of controlled substances. Listed in alphabetical order it gives the prescribed use, drug class, dosage, and most common side effects. This guide also gives you medical abbreviations, the top 200 prescribed medications used in the U.S., and a conversion table. It is a great tool to have when you don't have time to get to a computer.