What To Think About

• Potassium levels can also be checked in a blood test. For more information, see the topic Potassium (K) in Blood.
• Doctors may look at urine potassium and blood potassium levels to see whether conditions or medicines may be causing fluid or electrolyte imbalances. Urine potassium levels are often high when blood levels are low or low when blood levels are high. Urine potassium levels are affected by medicines and hormones.