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A creatinine of 1.42 is only mildly elevated, not severely elevated, but any elevation is more concerning than a normal level. The reason that the answers vary is because it depends upon the clinical situation. In general, everyone should be drinking plenty of fluids to maintain hydration and urine flow. There are some conditions that will tend to cause dehydration, which can increase the creatinine level, and these people should be drinking extra fluids. There are also some conditions,such as congestive heart failure, that decreases blood flow to the kidneys, cause fluid retention, and increase the creatinine, and these people will get worse if they drink extra fluids. There are also some people with more advanced kidney disease that may start developing swelling from fluid retention and these people also should restrict their fluid. The majority of people with a creatinine of 1.42 and do not have congestive heart failure or fluid retention/swelling from another cause, should drink plenty of fluids.