Description General description Prazepam is a benzodiazepine prescribed for the short-term treatment of anxiety. Sold under the trade name Centrax, this drug also has anticonvulsant, sedative, and muscle relaxant effects. This internal standard is applicable for quantitation of prazepam levels in urine, serum, or plasma by LC/MS or GC/MS for urine drug testing, clinical toxicology, forensic analysis, or isotope dilution methods. Legal Information CERILLIANT is a registered trademark of Cerilliant Corporation Snap-N-Shoot is a registered trademark of Cerilliant Corporation Snap-N-Spike is a registered trademark of Cerilliant Corporation