Creatinine blood test

A blood sample is needed .

Your health care provider may tell you to temporarily stop taking certain medicines that can affect the test. These medicines include: Cimetidine, famotidine, and ranitidine Certain antibiotics, such as cefoxitin and trimethoprim Tell your provider about all the medicines you take.

When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging sensation. Afterward, there may be some throbbing or slight bruising. This soon goes away.

Creatinine is a chemical waste product of creatine. Creatine is a chemical made by the body and is used to supply energy mainly to muscles. This test is done to see how well your kidneys work. Creatinine is removed from the body entirely by the kidneys. If kidney function is not normal, the creatinine level in your…

A normal result is 0.7 to 1.3 mg/dL (61.9 to 114.9 µmol/L) for men and 0.6 to 1.1 mg/dL (53 to 97.2 µmol/L) for women. Women often have a lower blood creatinine level than men. This is because women often have less muscle mass than men. Creatinine level varies based on a person's size and muscle mass. The examples…

A higher than normal creatinine level may be due to: Blocked urinary tract Kidney problems, such as kidney damage or failure, infection, or reduced blood flow Loss of body fluid (dehydration) Muscle problems, such as breakdown of muscle fibers ( rhabdomyolysis ) Problems during pregnancy, such as seizures caused by…

There is little risk involved with having your blood taken. Veins and arteries vary in size from one person to another and from one side of the body to the other. Taking blood from some people may be more difficult than from others. Other risks associated with having blood drawn are slight but may include: Excessive…

Gharavi AG, Landry DW. Approach to the patient with renal disease. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine . 27th ed. Philadelphia, PA: Elsevier; 2024:chap 106. Oh MS, Briefel G, Pincus MR. Evaluation of renal function, water, electrolytes, and acid-base balance. In: McPherson RA, Pincus MR, eds. Henry's…