I think this can either be acute or chronic tubulointerstitial nephritis. According to MSDmanuals, 'acute' TIN symptom onset can occur 18 months after NSAID use. The classic triad of fever, urticaria, and eosinophilia is only present in <10% of cases. Also, they can have proteinuria (<1 g/day) or even nephrotic-range proteinuria (>3.5 g/day) if it's caused by NSAIDs.
This is the link to my source: https://www.msdmanuals.com/professional/genitourinary-disorders/tubulointerstitial-diseases/tubulointerstitial-nephritis
Sorry forgot to post in same comment
proteinuria + hematuria, chronic analgesic abuse -> renal papillary necrosis , which can be a progression from acute interstitial nephritis (drug-induced hypersensitivity involving the interstitium and tubules)
Pathoma19 p127
submitted by โhayayah(1212)
Acute interstitial renal inflammation. Pyuria (classically eosinophils) and azotemia occurring after administration of drugs that act as haptens, inducing hypersensitivity (eg, diuretics, NSAIDs, penicillin derivatives, proton pump inhibitors, rifampin, quinolones, sulfonamides).