lidocaine

The substantial number of drug deaths involving both cocaine and lidocaine is largely due to lidocaine being frequently used as an adulterant in cocaine sold on the illicit market.

Lidocaine mimics the numbing effect of cocaine, making it a common cutting agent to increase volume and profits for dealers.

The presence of lidocaine adds to the toxicity risk, as it has its own harmful effects at high doses, including cardiac and neurological toxicity.