Serum Ammonia Concentration

Why This Test Is Done

Your healthcare provider may order a serum ammonia test if you have symptoms like confusion, fatigue, or trouble breathing. It’s also used to check for liver disease, kidney problems, or metabolic disorders. Sometimes, it’s done before or after surgery, especially if you have a history of liver or kidney issues.

What to Expect Before the Test

You’ll likely have a small needle inserted into your arm or vein to draw blood. The process is quick and usually painless. Avoid eating or drinking for a few hours before the test if your provider recommends it, as food can affect ammonia levels.

What the Results Mean

High ammonia levels may indicate problems with your liver or kidneys, which can’t properly remove waste from your blood. Low levels might suggest certain metabolic disorders or overmedication with drugs that lower ammonia. Your provider will discuss these results with you in detail.

Common Conditions Monitored

This test is often used to monitor liver diseases (like cirrhosis), kidney failure, or conditions affecting how your body processes proteins. It can also help track how well treatments for these conditions are working.