The thing you should bear in mind is that urine test will come back positive only if the amount of detected drug is above a certain level, and this is expressed in nanograms per milliliter (ng/ml). This is done to reduce the number of false-positives such as, for example, secondhand smoking.
Detection time is also one of the factors at play in this particular situation. For example, while alcohol is only detectable 7-12 hours after use, PCP can show up in traces after 8 days.
If you’re planning on getting a urinalysis, give us a call, and we will be more than happy to help you get the most reliable and accurate data.