hurt frog in wild

[Lija]

you can email or call Dr Frye for meds, but if you can go to any vet and ask to any broad spectrum a/b in liquid form they should be able to sell. systemic ones would be your best bet as you need to treat a lot of wounds superficial and it seems internal too. vet would have flamazine or similar too.
you can also use topical a/b creams from human pharmacy, anything without painkillers, polysporin or anything generic, just read everything on the label if not sure ask - it has to contain absolutely NO painkillers. that would work too, but not as well and fast as systemic, since you can't really get to every single place damaged. and you can combine that with melafix treatment, that stuff is available from any pet store, petsmart will have it for sure, it is in fish section in blue tallish bottles. you prepare water as per directions on a bottle and soak the toad for 20 min and then wet paper towels that he sits on with that stuff too, you can use it to spray once in a while during a day as well.do that every day changing paper towels every day as well.
you need to change that gravel that you have to plain moist paper towels. the cleaner it sits the better outcome.