A 54-year-old obese man was diagnosed with NIDDM 1 year earlier. He was staed on glipizide and metformin. His other medications are propranolol and nifedipine for hypeension, and naproxen, which he began 2 weeks ago for severe osteoahritis. His BP is 154/92. His BUN is 29 mg/dL and a creatinine of 1.8 mg/dL; both had been normal 1 year earlier. Which medications are most likely responsible for the increase in BUN and creatinine?