I was curious about
this as well when my PSA went from 10 to 9.5. My uro said this was just normal variation but I did find this study from 2010. It seems short term use of NSAID's would have little effect on PSA.
In total, 1,864 men met inclusion criteria. Nonsteroidal anti-inflammatory drug (NSAID; P = .03), statin (P = .01), and thiazide diuretic (P = .025) intake was inversely related to PSA levels. Five years of NSAID, statin, and thiazide diuretic use was associated with PSA levels lower by 6%, 13%, and 26%, respectively. The combination of statins and thiazide diuretics showed the greatest reduction in PSA levels: 36% after 5 years. Concurrent calcium channel blocker use minimizes or negates the inverse relationship of statin use and PSA level./www.ncbi.nlm.nih.gov/pmc/articles/PMC2940393/