# Hyperammonemia: Control Production and Consider Removal

Treat the neurologic danger and underlying cause; choose extracorporeal removal according to the syndrome and clinical trajectory.

![Infographic: Hyperammonemia: Control Production and Consider Removal](https://urinenephrology.org/visual-reference/images/mastery-ammonia.png?v=20261003c)

## A neurotoxic burden

Ammonia accumulation can cause encephalopathy and cerebral edema. Liver failure, metabolic disorders, medications, and other causes require different definitive treatments.

## Recognize urgency

Rapid neurologic deterioration, seizures, severe encephalopathy, or a rapidly rising concentration needs urgent specialist and critical-care assessment.

## Confirm and investigate

Assess sampling quality, clinical context, liver function, exposures, and possible metabolic disease. A number alone does not establish the mechanism.

## Choose removal for physiology

Intermittent HD can remove ammonia rapidly if tolerated. Continuous therapy provides sustained control and is often favored in unstable acute liver failure or cerebral-edema risk. Review delivered clearance, interruptions, and ongoing production; the membrane label alone does not choose the treatment.

## Monitor for rebound and treatment losses

Follow serial ammonia together with neurologic status, perfusion, fluid balance, and delivered treatment. Check phosphate and other electrolytes and adjust cleared medicines. Ammonia can rebound after intermittent treatment because production and redistribution continue; an initial fall does not establish durable control.

## Avoid a universal dialysis threshold

Interpret ammonia with the cause, neurologic trajectory, ongoing production, and rebound risk. Acute liver failure, metabolic disease, and chronic cirrhosis need different treatment pathways; one concentration does not define KRT need in every syndrome.

## Supporting evidence

- [The Role of RRT in Hyperammonemic Patients](https://pubmed.ncbi.nlm.nih.gov/27197910/)
- [How We Treat Hyperammonemia in Acute Liver Failure](https://pubmed.ncbi.nlm.nih.gov/37847521/)
- [Pediatric consensus: hyperammonaemia in children receiving continuous kidney replacement therapy (2020; not an adult universal KRT threshold)](https://pubmed.ncbi.nlm.nih.gov/32269302/)

## Source lessons

- [ammonia dialysis](https://urinenephrology.org/mastery/hepatorenal/ammonia-dialysis.html)

Read alongside the full lessons; the findings and decisions shown here require the stated clinical context.