Yes absolutely ranitidine can cause a false positive for meth. i recently failed a urine test. Said i used meth. Not possible! I took 1 ranitidine 150mg about two and a half hours before my drug screen. The only other drugs i took were ibuprofen and rolaids. I really dislike all medication. Thankfully my employer allowed a confirmation test. A hair test proved my innocence. Still it cost me several hundred dollars in lost wages. Personally i will choose to suffer the unbearable stomach pain rather than risk my job again.
Yes, it will. It just happened to me. I have been using pretty large amounts of Zantac, for years. When my employer very recently gave me a random, on the spot urine drug test, I came back positive for methamphetamine! - a substance I most certainly do not use! Nor have I ever.
The pharmacist, at my Physicians office told me, and my employer, that it was the Zantac causing the problem. An extremely embarrassing problem, I might add!!
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