Antidote Stocking for General Practice Clinics

Core Essential Antidotes for GP Clinics

A general practice clinic should stock a limited but essential set of antidotes focused on immediately life-threatening overdoses that are commonly encountered in outpatient settings, with naloxone for opioid overdose being the absolute priority, followed by activated charcoal (if available), and consideration for N-acetylcysteine for acetaminophen overdose 1, 2
The American Heart Association recommends an initial adult dose of naloxone of 0.2-2 mg IV/IM, and 0.1 mg/kg for pediatric patients 3
Multiple doses of naloxone may be required as it has a shorter duration than many opioids 3, 4
The American College of Emergency Physicians suggests that having immediate access to N-acetylcysteine allows initiation before transfer to hospital 1
Activated charcoal reduces absorption of many ingested toxins when given within 1 hour 1, 2

The expert consensus guidelines specifically address hospitals that provide emergency care, not general practice clinics, and recommend against stocking flumazenil, digoxin immune Fab, glucagon, calcium salts, methylene blue, physostigmine, and pralidoxime in GP clinics 1, 2, 3, 5, 6, 7, 8
Flumazenil should NOT be routinely stocked in GP clinics due to its potential to precipitate refractory seizures and life-threatening withdrawal 1, 2, 3, 9

Geographic location, patient population, and transfer time should be considered when deciding which antidotes to stock 1, 2, 5, 8
The American College of Emergency Physicians recommends stocking naloxone, considering N-acetylcysteine if transfer time is >30 minutes, and having activated charcoal available if performing any overdose management 1, 2, 3, 5

Stocking antidotes without proper training can cause harm if used incorrectly 3, 9
Delaying transfer while attempting antidote therapy can be harmful, and GP clinics should stabilize and transfer, not provide definitive care 5, 8, 7
Assuming naloxone alone is sufficient for respiratory depression can be harmful, as mixed overdoses are common and require supportive care beyond antidotes 3, 4, 9

Thiamine should be available for administration before glucose in suspected alcohol-related presentations to prevent Wernicke's encephalopathy 4