the product is called tylan 200. it is marketed as a bovine medicen but after talking to a few vets they say that it is more than safe for use on boids only. i have never treated a snake that did not get better.
this has ben refered to me by a few good frinds in the snake bisnuess. one of the most popular people that use it is jeff ron of boaphile plastics who has the largest collection of boas in the us. he says he has been useing this product for a over 15 years and has not had a problem.
the recommended dose. you have to figure out the snakes poundage then times that number by 1.25 and this number is the ammount of cc's you should use. there is a total of three treatments total. one ever three days. i have only ever had to extend 2 more doses for 1 relly bad problem that arose from getting a snake in the middle of winter that was not packed right.
dont get me wrong i do believe in going to the vet for real medical problems. but to me a mild case of ri is like going to the doctor for a sinus infection. ie there are pleanty of over the counter meds that will cost you a hell of a lot less than going to the doctors office.
this is just what has worked for me, and many others. i advise you talk to your vet before you do anything to your animals.
( my little disclaimer)