A member asked:

Could creatinine of 1.49 and bun of 28 be affected by or related to my switching from losaratan 100mg to losaratan hctz 100mg? i also take metoprolol er 100mg. how should high creatinine and bun be treated?

A doctor has provided 1 answer
Dr. Hiep Le answered

Specializes in Nephrology and Dialysis

Yes, adding Hctz 25 mg (I assume) to Losartan 100 mg may increase BUN & Creatinine about 10 to 20%. I guess your baseline BUN/Creatinine were not optimal (BUN 22-25 & Creat 1.2 -1.3, approximately). The reason is because of the interaction between a slightly lower volume & med's adverse effect and a lower renal perfusion due to better BP with new med. This change is due to med, not a renal injury.

Answered 7/6/2023

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