The only things that make obvious sense would be not stressing/exhausting your body and immune system and taking probiotics afterwards to reestablish decent gut flora. Taking probiotics and antibiotics at the same time might be ineffective.
So you might consider adjusting diet and training intensity.
Research the antibiotics that are prescribed to see if they need to be taken on an empty stomach. Things like protein shakes might create a problem if the drug does not like high concentrations of amino acids. There may be other unknowns.