Can prescription medications cause a positive result on a drug screening?

Yes, legally prescribed medications can cause an initial screening to return a positive result. Many common prescriptions, such as strong pain relievers, anxiety medications, and ADHD treatments, contain compounds that trigger reactions on standard testing panels. When an initial screening detects these substances, it is categorized as a presumptive positive until further verification occurs.

To ensure fairness, a process involving a Medical Review Officer is standard practice for professional workplace testing. This officer is a licensed physician who reviews all laboratory results and contacts the employee directly if a positive result occurs. The employee is given an opportunity to provide legitimate medical documentation, such as a valid prescription or a doctor letter, to justify the presence of the substance.

If the Medical Review Officer verifies that the medication is being used legally and according to directions, the final result is reported to the employer as negative. This protective measure ensures that employees are not unfairly penalized for managing legitimate health conditions under medical supervision.