Common Specific Antidotes

Toxin

Antidote

Acetaminophen

N-Acetylcysteine

Anticholinergics

Physostigmine*

Anticoagulants, oral factor Xa inhibitors (apixaban, edoxaban, rivaroxaban)

Andexanet alfa

Benzodiazepines

Flumazenil*

Black widow spider bite

Lactrodectus antivenom

Botulism

Botulinum antitoxin

Beta-blockers

Glucagon

IV lipid emulsion

Calcium channel blockers

Calcium

IV insulin in high doses with IV glucose

IV lipid emulsion

Carbamates

Atropine

Pralidoxime chloride

Crotaline snake bites (US)

Crotalinae polyvalent immune Fab (ovine)

Cyanide

Hydroxocobalamin

Cyanide antidote kit (includes amyl nitrate, sodium nitrite, and sodium thiosulfate)

Dabigatran

Idarucizumab

Digitalis glycosides (eg, digoxin, digitoxin, oleander, foxglove)

Digoxin-specific Fab fragments

Ethylene glycol

Fomepizole

Ethanol

Heavy metals

Chelating drugs (see table Guidelines for Chelation Therapy)

Ionizing radiation

Potassium iodide

Iron

Deferoxamine

Isoniazid

Pyridoxine (vitamin B6)

Methanol

Fomepizole

Ethanol

Methemoglobin-forming agents (eg, aniline dyes, some local anesthetics, nitrates, nitrites, phenacetin, sulfonamides)

Methylene blue

Methotrexate

Leucovorin (folinic acid)

Glucarpidase (carboxypeptidase-G2)

Opioids

Naloxone

Organophosphates

Atropine

Pralidoxime

Scorpion envenomation (Centruroides sp)

Centruroides immune F(ab’)2

Sulfonylurea

Octreotide

Thallium

Prussian blue

Tricyclic antidepressants

Sodium bicarbonate

Unfractionated heparin

Protamine

Valproic acid

L-Carnitine†

Warfarin

Vitamin K

Fresh frozen plasma

Prothrombin complex concentrate (PCC)

* Use is controversial.

† There is limited evidence for the efficacy of L-carnitine as a general antidote for acute valproic acid overdose. However, L-carnitine is likely to be safe and it is reasonable to consider using it in patients with decreased level of consciousness.

Fab = fractionated antibodies.