Hi X,
You are half right.  Helicobacter can develop resistance to Amoxicillin
or Flagyl if they are used alone.  Thus it is recommended to use those
2 antibiotics together.  However on page 335 of Dr Fox's book (second
edition) he recommends only Biaxin and Tritec as the new treatment.  It
does not include Amoxicillin with Biaxin nor does it suggest using
Carafate.  This is referenced to a study that was published in Lab Animal
Science (1997;47:434.) in which Dr Fox was a coauthor.  Dr Fox's book
also list the doses for Prilosec and Tagamet as other antacids that can
be used instead of Tritec.  Based on the 1998 PDR, the human treatment of
H. pylori and ulcers is Biaxin with an antacid (Tritec or Prilosec).  I
am not sure what Dr Purcell's book recommends, but she can reply as to
why she recommends Amoxicillin with Biaxin.
 
Jerry Murray, DVM
[Posted in FML issue 3481]