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Neonatal Drug Therapy Manual |
Phentolamine
Disclaimer: Official controlled document is the CHEO and Ottawa Hospital online copy. It is the responsibility of user to ensure that any paper copy version is the same as the online version before use.
Classification:
Alpha-Adrenergic Blocking Agent
Indications:
- Treatment of alpha-adrenergic agonist drug extravasation (eg. dobutamine, dopamine)
Dosage:
- Draw up 0.5 mL (2.5 mg) of commercially available Phentolamine 5 mg/mL and further dilute with 4.5 mL of 0.9% NaCl for a final concentration of 0.5 mg/mL.
- Using a 27 gauge needle, administer five 0.2 mL injections (for a total of 0.5 mg) subcutaneously into the extravasation site at the leading edge, changing the needle after each injection
- Total dose required depends on the size of extravasation; dose may be repeated if required, do not exceed 2.5 mg total
Side Effects:
- CVS: arrhythmia, hypotension, tachycardia
Parameters to Monitor:
- BP, HR
- Extravasation site, as repeated doses of SC phentolamine may be needed
Notes:
- May be used up to 12 hours after extravasation occured
References:
- Taketomo CK, Hodding JH, Kraus DM. Pediatric Dosage Handbook 22th Edition. Hudson: Lexi-Comp Inc.; 2015
- The Children's Hospital of Eastern Ontario. (2014 Revision). Treatment of Infiltrated Vesicant or Irritant Drugs.
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