I've just dealt with ich in my tank and took the temperature up to 30.5C for about a week as a last ditch to kill the stuff (white spot plus didn't work for me for some reason).
Anyway, my bristlenose was perfectly happy and showed no visible signs of stress. I did up the temperature gradually though over a few days. This is obviously no guarantee that yours will be fine, but you can certainly try it and just watch him carefully. If he stops moving about as much / feeding then lower the temperatures again.
You need to run a couple of air stones in the tank at 30C as well. I'd hoped the Ich would go at 28C, but it didn't wipe it all out. Not until it got to 30C did it go.
Incidentally, I wouldn't personally put the meds in while the tank is at 30C, because I think it would be too stressful. I used the Ich plus at the recomended 26C.
Good Luck!