What is the appropriate naloxone dosage for a 14‑kg child?

Naloxone Dosage for a 14kg Child

For a 14kg child with opioid overdose or respiratory depression, administer naloxone 0.1 mg/kg intravenously, which equals 1.4 mg for this child. 1

Dosing Algorithm

The appropriate naloxone dose depends on the clinical scenario:

For Suspected Opioid Overdose

• Standard dose: 0.1 mg/kg IV/IM/SC for children <5 years old or <20 kg 1
• For this 14kg child: 1.4 mg IV/IM/SC
• Alternative initial approach: 0.01 mg/kg IV initially, followed by 0.1 mg/kg if inadequate response 2
• Repeat dosing: May repeat every 2-3 minutes as needed to maintain reversal 1

For Therapeutic Opioid Reversal (Post-sedation/Analgesia)

• Lower doses: 1-15 mcg/kg (0.001-0.015 mg/kg) to avoid complete reversal of analgesia 1
• For this 14kg child: 14-210 mcg (0.014-0.21 mg)
• Titrate carefully: Give incrementally every 2-3 minutes to desired effect

Route-Specific Considerations

Intravenous/Intraosseous: Preferred route for fastest onset (2-3 minutes) 3

Intramuscular/Subcutaneous: Acceptable when IV access unavailable; may divide into multiple injection sites if needed 1

Intranasal: 20 mcg/kg (0.28 mg for 14kg child) achieves quantifiable levels within 5 minutes and peak concentrations within 20 minutes in most children 4

Endotracheal: NOT recommended for newborns; less reliable absorption 1

Critical Safety Points

Duration of Monitoring

• Observe continuously for at least 2 hours after last naloxone dose 1
• Naloxone duration (45-90 minutes) is shorter than most opioids, requiring vigilance for re-sedation
• Half-life in children is approximately 70 minutes 5

Contraindications and Warnings

• Do NOT use if mother has long-term opioid use (risk of acute withdrawal/seizures in newborns) 1
• May precipitate acute withdrawal in opioid-dependent patients 1
• Can cause hypertension (17% incidence), tachycardia, and rarely pulmonary edema 3

Expected Physiological Changes

Following naloxone administration, expect moderate increases 3:

• Respiratory rate: +5-7 breaths/minute
• Heart rate: +5 beats/minute
• Blood pressure: +6 mmHg systolic, +4 mmHg diastolic
• These changes typically resolve spontaneously

Practical Dosing Example

For your 14kg child with opioid overdose:

1. Draw up 1.4 mg (1.4 mL of standard 1 mg/mL concentration)
2. Administer IV over 30-60 seconds
3. Assess response at 2-3 minutes
4. Repeat 1.4 mg if inadequate reversal
5. Continue monitoring for minimum 2 hours

The evidence strongly supports weight-based dosing at 0.1 mg/kg as the standard approach for pediatric opioid reversal, with lower doses reserved specifically for reversing therapeutic opioid effects where maintaining some analgesia is desired 1, 2.