Testing for drugs of abuse and alcohol on urine samples is available at all samedaydoctor clinics for employees who need this to meet work requirements, such as those working offshore in the oil and gas industry. Selected clinics offer chain of custody where measures are taken such that the results of testing would be submissable in court. Hair testing is also available at selected clinics to look at longer term substance use. Individuals may wish to have drug testing for a variety of reasons, for example in child custody cases. Click here for more about drug of abuse testing.