Hi Guys
There is no medicine just for Koi, all Koi medicine are either as used by humans or for animals, we then adapt it for out koi, so ye Marius go ahead and use it, just take care of overdosing in some instances.
Wayne, as for the sticking to the wound, you can use a good quality Bentonite it will keep it there for long enough to do its job. Some meds have already done their job in as little as 1 minute.
Just for info: in case you have nothing to use pure Bentonite only, over the wound will also help.