what medicine is that? something with methylene blue or malachite green? I used some once without it causing any problems, and I believe that if it does stain, that time will fade it away - but I'm not sure. Also, you may want to add some stress coat or melafix to help the fish build up their defenses.
edit: i have read that ick, when hatching out of the gravel, will swim towards the light. SO, turning off the light as much as possible helps keep the ich near the bottom, rather than swimming up through the tank towards the light.
also, because of the higher temperature, and medication, you may need to increase aeration. and remember to remove your carbon.
GOOD LUCK
