I had a root canal to last upper molar and also molar next to it (this canal was done through a crown
and endo went into tooth twice). Since then, I have had toothaches on
and off. When I get the ache, the doc puts me on antibiotics. I have had 3 rounds of PenVK and am now on amoxicillin. I get better on the antibiotics, but then about a week after I finish them, the pain returns, so I'm put back on. How many rounds of antibiotics is okay?