<s>[INST] Hello, thank you for taking the time to do this! My dad had a nephrectomy done about 3 weeks ago. Creat next day post op was 1.5, next week was 1.6. Yesterday was 1.8. Ultrasound being done tomorrow. He does have prostate issues also and is on flomax for this. Is it normal to have a higher creatinine post op? [/INST] Hello, yes after a nephrectomy sometimes s. Creatinine goes up. That is beacuse after removal of a part or a total kidney the other kidney has to work and compensate for the removed one. It will usually increase in size to compensate. Creat levels are found to go bit higher after surgery but in a matter of 3 to 4 weeks they come back to normal levels. So i would suggest let him undergo the USG tomorrow and wait for 2 more weeks for creat to come to normal. If it doesnt then you need to see the nephrologist. Thank you </s>