AMMONIA

You should get an ammonia test if you have liver disease with confusion, drowsiness, personality changes, hand tremors, or unusual sleepiness. It is also recommended for newborns or children with vomiting, poor feeding, lethargy, or seizures, people on valproate with confusion, and unexplained altered consciousness. Severe confusion needs emergency care.

Fasting for 6–8 hours is often recommended before an ammonia test, as a high-protein meal can raise levels. Avoid smoking for several hours and strenuous exercise beforehand. Avoid clenching your fist during sample collection. Inform your doctor about medicines like valproate, diuretics, or narcotics. The sample is kept on ice and tested quickly.

Fasting is often recommended for an ammonia test. You may be asked to fast for 6–8 hours, drinking only water, as a high-protein meal can raise ammonia levels. Also avoid smoking and strenuous exercise beforehand. In an emergency, however, the test is done immediately without waiting to fast.