There is strong scientific evidence that shows this step may seem like a good deterrent but it is ineffective. Schools which have used random drug screening with students did not really show lower student substance abuse rates, and the cost can be high. This can take away from limited resources that could be better used somewhere else. 
Pediatricians in the USA have come out against a policy change, and argue that this move would not detect the sporadic use of drugs or frequent alcohol abuse. Students in schools with a drug testing policy on a random basis were not less likely to drink or do drugs, so the policy does not act as the deterrent that may be believed.
Researcher and University of Pennsylvania’s Annenberg Public Policy Center Adolescent Communication Institute Director Daniel Romer discussed random drug testing in order to identify student substance abuse. Romer explained “Random drug testing has no impact on kids’ beliefs about drugs. The question remains, how do you create a positive climate? The idea of drug testing sounds good. The reality is different.” Other issues include false positive results caused by medications for certain disorders or from certain food products.
