Which drug is most commonly produced in illegal laboratories?

Meth is the drug most commonly produced in illegal laboratories primarily due to the relative ease of its synthesis and the availability of precursor chemicals. Methamphetamine can be manufactured using ingredients that are often found in everyday household products, such as cold medications containing pseudoephedrine. Its production in illegal labs allows for significant profit margins, which incentivizes the operation of these clandestine facilities.

While cocaine and heroin are derived from natural sources and require extensive refining processes, the methods for producing methamphetamine can be conducted in much simpler setups. Additionally, the high demand for methamphetamine in many regions has led to an increase in its unlawful production. This combination of demand, simplicity in production, and potential for high profitability makes meth the most commonly manufactured drug in illegal labs.