Interceptor will significantly alter the micro-fauna ecosystem in your tank, as it kills anything that produces chiton (shrimps, crabs, copepods, etc). Many people also notice an explosion of AEFW's after an interceptor treatment. I have seen this happen with at least 5 clients over the years. I used to feel that red bugs were the kiss of death, but i have some in my tank now, and my SPS are growing the fastest they ever have. Red bugs DO also carry over to montis as well, so if everything SPS looks like crap across the board it could be something other than red bugs. If just acros (or one colony) looks like crap, I would check for AEFW's, you can find spotting at the base of the colony, very easy to see. My point is don't over react, many times ppl treat for red bugs, and have very little improvement. Exhaust your other options first.
You can get some interceptor from local stores too (I know Sea Schor usually has some on hand), and GRS over in Highland Park had the bulk pure milbemycin oxime as well, maybe they would do you a solid.