Rise In Serum Creatinine Due To Librium?

I'm diabetic since 6 years & hypertensive since 2 years.Diabetes remains under control but bp sometimes get uncontrolled My serum creatinine level on 11th May was 0.9 mg/dl & on 21st September it came 1.1 mg/dl. (Lab normal : 0.72-1.25).Had low protein diet & adequate hydration the day before the test However,blood urea & serum potassium came normal at every time Urine ACR done on 1st August was also normal USG (KUB+PVRU) done on 4th April was also normal Took Chlordiazepoxide (Librium) 25 mg twice a day for 2 months which was discontinued 1 week before the test A doctor told me that the prolonged use of Chlordiazepoxide (Librium) 25 mg twice a day for 2 months could be the reason of such rise in serum creatinine Need to know whether such prolonged use of Chlordiazepoxide (Librium) could be the reason of such rise in serum creatinine levels