Adulterants encountered in the illicit cocaine market

Illicit cocaine samples (156), seized on Rome's illegal market between January 1996 and June 1997, were examined. Both the purity of the cocaine and the presence of substances employed for dilution were determined for each sample. Adulterants were found in many of the street samples analysed. Lidocaine (average 14.7%) followed by caffeine (average 9%) proved to be the adulterants most frequently encountered in the cocaine samples.