Click on the link above to get Uric Acid & Pain Relief: Kidney Function Effects.
This report about NSAIDs, kidney function, and uric acid, when fasting, is one of the references to Uric Acid, Pain & Diclofenac. The full report title is “Effect of Short-Term Use of Different Non-Steroidal Anti-Inflammatory Drugs on Renal Function During Fasting in Ramadan.” It was published in Jan-Mar 1985 by Al-Arfaj HF et al.
This investigation confirms a short term uric acid increase from fasting. They conclude that using NSAIDs at this time has no adverse effects, but note that there is an emphasis on short term use.