All COX inhibitors, though, may have a direct effect on recovery. A daily aspirin may be enough to slow down muscle recovery and growth by a noticeable degree. This goes for all COX inhibitors and NSAIDs. I personally never take NSAID painkillers within the 36 hour window of a workout, where you want maximum protein synthesis.
That is of course a different subject but a valid point I believe. Can you suggest any reading on the matter?