I have to do a drug test for a job, ive never done drugs but was wondering if anything I take perscription or even vitamins can make it look like I di?

False Positive. Some commonly used over the counter drugs including antihistamines can result in false positive drug tests. Vitamins do not cause false positive drug tests. Here is an article about false positive drug tests: https://www.drugs.com/article/false-positive-drug-tests.html.