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# L-Ornithine L-Aspartate (Hepamerz)
## Overview
L-Ornithine L-Aspartate (LOLA) is a combination of two amino acids, ornithine and aspartate, believed to aid in ammonia detoxification in the liver.
## Primary Indications
Treatment of hyperammonemia, particularly in patients with liver disease (e.g., hepatic encephalopathy).
## Adult Dosing
* **Oral:** Typically 3-6 grams three times daily, with doses up to 9 grams three times daily reported.
* **Intravenous (IV):** 5-10 grams daily, often infused over 30-60 minutes. Doses up to 20 grams daily in divided doses have been used in severe cases. Specific IV dosing protocols may vary; consult local guidelines.
## Pediatric Dosing
Dosing in children is not well-established. Data is limited, and use should be based on specialist recommendation and careful monitoring. Some sources suggest a starting dose of 100-150 mg/kg/day orally in divided doses for hepatic encephalopathy, but this is not universally adopted.
## Dose Adjustments
No dose adjustment is typically required for renal or hepatic impairment, as the drug's mechanism is related to supporting liver function. However, caution is warranted in severe renal impairment due to potential accumulation of metabolites.
## Contraindications
* Hypersensitivity to L-ornithine or L-aspartate.
* Severe renal insufficiency.
## Adverse Effects
Generally well-tolerated. Gastrointestinal disturbances (nausea, vomiting, abdominal pain, diarrhea) are the most common. Rare: rash, pruritus.
## Key Drug Interactions
None well-documented.
## Monitoring
* Serum ammonia levels.
* Liver function tests.
* Renal function.
* Electrolytes.
## Clinical Pearls
* LOLA works by stimulating the urea cycle (ornithine's role) and promoting ammonia removal in hepatocytes (aspartate's role).
* The oral formulation may have variable absorption.
* Onset of action for IV administration may be more rapid than oral.
* Effectiveness is dependent on functioning liver cells.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the official prescribing information and relevant clinical guidelines for the most up-to-date and comprehensive drug details, including specific product formulations and country-specific indications and contraindications.
