yes, the navigation on this site is a bit obscure sometimes, and it changes every so often.
In the right hand column on your screen, the first thing is an advertisement about 2x2" or so. The next thing below that is a tiny bar that says 'search this community', so if you type 'antibiotics' in, it will pull up only posts in this Lyme site/page that mention antibiotics, instead of from the whole of MedHelp.