Yes it can! The Mayo Clinic has an article on it. The employer should have sent it off to a lab for conformation.
Can A False Positive For Meth Be Ranitidine?
I failed a pre employment drug screen yesterday. I tested positive for amphetamines. I take Ranitidine 150mg twice daily. If you take Ranitidine or Zantac this could show up positive for Amphetamines