ST. PAUL, Minn., April 14, 2010 (GLOBE NEWSWIRE) -- MEDTOX Scientific, Inc. (Nasdaq:MTOX) today announced results for the first quarter ended March 31, 2010. MEDTOX achieved a significant increase in new clinical laboratory business for the quarter ended March 31, 2010, and laboratory drugs-of-abuse testing showed a net positive increase in revenues for the first quarter of 2010, compared to the prior year quarter. This was the first year-over-year same quarter increase in drugs-of-abuse testing in six quarters.