II. Normal: 10-80 ug/dl
III. Increased Serum Ammonia
- Hepatic failure
- Hepatic Encephalopathy
- Cirrhosis
- Reye's Syndrome
- Portacaval shunt
- Medications
- Diuretics
- Polymixin B
- Methicillin
IV. Decreased Serum Ammonia
- Renal Failure
- Medications
- Neomycin
- Lactulose
- Tetracycline