Adecco Staffing may conduct drug tests on candidates as part of their hiring process, depending on the specific requirements of the job or the client’s policies. In summary, Adecco Staffing's approach to drug testing candidates can vary based on the job and client needs. It is important to understand that while some positions may require drug screening, others may not. Therefore, candidates should be prepared for the possibility of undergoing a drug test, especially if the role they are applying for has strict compliance or safety regulations.