The term DRUG UNIT can be broken down into two crossword solutions: KILO (4 letters) and PILL (4 letters). KILO is a unit of measurement used to measure mass, usually referring to a kilogram. PILL is a small, round object that is usually made of medicine or drugs, and is taken orally. Together, these two words form the term DRUG UNIT, which is a law enforcement unit that focuses on the investigation and prevention of drug-related crimes.