Final answer:
Proton Pump Inhibitors (PPIs) can potentially cause false positive results on urine drug screens, particularly for cannabinoids (THC), due to cross-reactivity in the immunoassay testing methods used.
Step-by-step explanation:
The question "What does PPI cause a false positive on urine drug screen for" refers to the phenomenon where Proton Pump Inhibitors (PPIs), a class of medication commonly used to treat conditions like acid reflux and peptic ulcer disease, can interfere with urine drug screening tests and produce a false positive result. False positives are incorrect results in which the test mistakenly detects the presence of a drug when it is not actually present.
Common False Positives with PPIs
Some studies indicate that certain PPIs may cause false positive results for cannabinoids (THC), as drug tests use immunoassay techniques that may cross-react with non-target substances. It's important to note that not all PPIs have this effect, and the likelihood of a false positive may vary based on the specific test used and other individual factors.