My doctor has prescribed Pepcid for my tummy problems. My book 'Could It Be B12' says this is an H2 blocker that interferes with B12 absorption. Is this really the right medicine for me to take? I'm my doctor's first PA patient ever, I don't want to be his guinea pig experiment. I've seen some articles about taking acid supplements like betaine hydrochloric, is that what I should really be doing?