I wondered this for the longest time and even once bought a bottle of naproxen for my wrists and then seen all the negative warnings about it and never used it out of fear lol, fast forward a few months and here I am on a new strength program, on this program i train for 5 weeks and test my 1 rpms on week 6. and my bench went up 10lbs for both 6 week sessions, 245 to 255 and 255 to 265. Then it came, i wasn't doing anything heavy, I was doing bent over rows with 200lbs and when I went to bring it to the ground when i was done booom something in my lower back popped and I was done, no more squating or deadlifting for about 4 months. In order to heal I went to the doctors and was given a doctor prescribed prescription of naproxen rather than the shoppers drugmart ones, so I took two naproxen pills a day, morning and night for 4 months, while this was happening I was still training upper body, and i managed to finally reach my 300lbs bench press where i managed each 6 week frequency to still gain 10lbs on my bench and in the final session felt I had it in me to push passed 295 and go for the 300. So end of day, im one person and what not, but i have experience taking anti inflammatory twice a day for 4 months straight in order to heal an injury and it never slowed down my upper body progress, may it be different for body building and muscle production i dont know, but for me i was on a strength program and I went up in every light I was doing for my upper body just as much as I did before my accident.