However, evidence of drug residue was found among several students.

Five or six provide enough drug residue for one injectable dose.

DrugWipe, which resembles a home pregnancy test, can detect drug residue for up to eight weeks.

Tinfoil containing drug residue was also found, she said.

The DrugWipe is a test used to wipe surfaces for traces of drug residue.

It develops and manufactures a range of cost effective screening solutions for drug residues.

On March 21, the police said they had found drug residue in his car.

The presence of drug residues above the established tolerance levels for human food poses a serious health hazard to the public.

Treating hogs with dantrolene, however, would leave drug residues in the meat.

If I had my druthers, we'd look at hair, which is more expensive, but lets you pick up drug residues from three months ago.