Fentanyl

Fentanyl is a highly potent synthetic opioid pain reliever, estimated to be 50 to 100 times more potent than morphine. It works by binding to the body's opioid receptors, which are found in areas of the brain and nervous system that control pain and emotions. Due to its extreme potency and high risk of abuse, dependence, and fatal overdose, its use is strictly regulated.

Dosage by Body Weight

Dosing must be highly individualized and carefully titrated by a healthcare provider. Transdermal patches and transmucosal formulations (lozenges, buccal tablets, sprays) are strictly contraindicated in opioid-naive patients due to the high risk of fatal respiratory depression. Safe outpatient use requires demonstrated opioid tolerance.

  1. Body Weight
    Below 5 kg
    Dose
    Strictly restricted / Specialist use only
    Frequency
    As determined by a pediatric anesthesiologist or neonatologist
    Tracking Notes
    Extremely high risk of life-threatening respiratory depression. Restricted strictly to neonatal intensive care or controlled surgical settings.
  2. Body Weight
    5-7 kg
    Dose
    Strictly restricted / Specialist use only
    Frequency
    As determined by a medical specialist
    Tracking Notes
    Not for routine use. Weight-based dosing (typically 1 to 2 mcg/kg IV) must only be calculated and administered by trained clinical staff in acute settings.
  3. Body Weight
    8-10 kg
    Dose
    Strictly restricted / Specialist use only
    Frequency
    As determined by a medical specialist
    Tracking Notes
    Contraindicated for outpatient or opioid-naive use. Requires continuous physiological monitoring if administered intravenously in a clinical setting.
  4. Body Weight
    11-15 kg
    Dose
    Strictly restricted / Specialist use only
    Frequency
    As determined by a medical specialist
    Tracking Notes
    Transdermal patches and buccal formulations are generally not indicated. Highly restricted to specialized pediatric palliative care or anesthesia.
  5. Body Weight
    16-20 kg
    Dose
    Strictly restricted / Specialist use only
    Frequency
    As determined by a medical specialist
    Tracking Notes
    Lozenges (e.g., Actiq) are only indicated for breakthrough cancer pain in opioid-tolerant pediatric patients aged 2 years and older who meet specific weight and tolerance criteria.

Formulation

InjectionTransdermal PatchBuccal TabletLozengeNasal SpraySublingual Spray

Purpose

Management of severe chronic pain requiring continuous, around-the-clock opioid administration (such as cancer pain), management of breakthrough pain in patients already tolerant to opioid therapy, and as an anesthetic agent or sedative in clinical settings.

Generic Name

Fentanyl Citrate

Branded Drug Names

Fentanyl is listed as a generic drug name. Common branded medicines that may contain the same active ingredient include:

Scheduled Drug

Yes. This medicine should be supplied or used only according to applicable prescription and regulatory requirements.

Alternatives

Disclaimer: This information is for educational purposes only. WHO references and weight bands are simplified for tracking and must not replace medical advice. Always consult with a healthcare professional before starting or changing any medication.