I use Antibiotics cautiously. I have found I get a little weaker after taking them, and it can take me a couple of weeks afterward to get all of my strength back. One might argue it was the underlying issue that caused the weakness, but it seems the majority of the antibiotics pushed my way have been for “preventative” reasons, all before or after dental, dermatology or bigger surgeries that have risk of developing infection. Even if it’s for an actual infection (sinus), I talk to them about prescribing the most proven PN friendly antibiotic at that time. If it’s a precautionary antibiotic prescribed, we have the same discussion as well as weighing if we can do without it and react “if” signs of infection start, or at least the safety of when the antibiotic can be safely stopped vs the standard 5-7-10 days if the infection risk advises us to be that vigilant up front. I cannot prove antibiotics have personally affected me, but I feel my body has told me I indeed feel a weakness develop. Always have the discussion with your doctor and make your PN concerns clear with him/her.