Finnegan NAS Calculator
Calculate the Finnegan Neonatal Abstinence Score from neonatal withdrawal symptom assessments.
What Is the Finnegan Neonatal Abstinence Score?
The Finnegan Neonatal Abstinence Score (NAS) is a clinical tool used to assess withdrawal signs in newborns exposed to opioids or other substances in utero. Nurses score observable symptoms across central nervous system, metabolic, respiratory, and autonomic categories, then sum the total to guide monitoring and treatment. For related newborn assessments, see the APGAR Score Calculator.
Symptom Categories
This simplified calculator covers major Finnegan domains: CNS signs (cry, sleep, tremors, reflexes, seizures), metabolic and GI signs (sweating, temperature instability, yawning, mottling, nasal stuffiness, sneezing, poor feeding, vomiting, loose stools), respiratory tachypnea, and autonomic fever. Each item uses the standard Finnegan point scale for that symptom.
Interpreting the Total Score
Scores below 8 usually do not require pharmacological treatment. Scores from 8 to 12 suggest mild withdrawal, 13 to 16 moderate withdrawal, and 17 or higher severe withdrawal requiring urgent clinical review and closer monitoring.
Frequently Asked Questions
What does NAS stand for?
Neonatal abstinence syndrome. It describes a group of withdrawal signs that can appear after in-utero exposure to opioids, benzodiazepines, alcohol, or other substances.
Who should use the Finnegan score?
Trained nurses and clinicians in nurseries or NICUs use Finnegan scoring on a scheduled basis. This calculator is for education and does not replace bedside assessment protocols.
When is treatment typically considered?
Many units begin closer observation around scores of 8 and consider pharmacologic treatment when scores persist at 12 or higher, though local protocols vary.
Why are seizures scored differently?
In the Finnegan scale, seizures carry 5 points because they represent a severe neurologic sign requiring immediate medical attention.
How often should NAS be scored?
Hospital protocols often score every 3 to 4 hours while symptoms are evolving, then adjust frequency based on stability and treatment response.
Can parents use this score at home?
No. NAS assessment requires trained clinical observation. Parents should follow their care team’s guidance and seek urgent care for breathing difficulty, poor feeding, or seizures.
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