He's pretty wrong on drug administration(Baytril is given IM, not SQ), as well as what Baytril is good for. It will not treat Pseudomonas infections(Amikacin and Fortaz will).
He's also not correct on the amikacin dosage, it's 5mg/kg the first dose and 2.5mg/kg every subsequent dose q72h. It is different in other types of reptiles though.
Also, trimethoprim sulfamethoxazole(Bactrim) is a good antibiotic, but must be given orally as the injectable is on a LONG back-order.
He needs to update that website!