From Biohacking Wiki

Antibiotics Recovery

"Saccharomyces boulardii, which I think is one of the most important probiotics you can take when you’re taking antibiotics because it’s a beneficial fungus, actually, not a bacteria, and so it’s not susceptible to the action of the antibiotics, and it’s one of the probiotics that has the most research behind it in terms of protecting the gut microbiota from antibiotics."

Broad-spectrum probiotic like VSL#3.

Eat lots of fermentable fibers prebiotic supplement: soluble fibers like glucomannan or partially hydrolyzed guar gum

or something like BiotaGen or Prebiogen (which are non-starch polysaccharides like FOS and inulin), or some resistant starch like green banana or green plantain flour are good options. Those, together with the probiotics and the bone broth, can be really helpful in restoring the gut microbiome after antibiotic use.[1]