[Lyubimova]

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MAJOR RECOMMENDATIONS
Grades of recommendation (A-D, Z) and levels of evidence (1a-6) are defined at the end of the "Major Recommendations" field.

All patients with suicidal intent, intentional abuse, or in whom a malicious intent is suspected (e.g., child abuse or neglect) should be referred to an emergency department (Grade D).
Patients who are symptomatic (more than somnolence or exhibiting coma or seizures) after a valproic acid ingestion should be referred to an emergency department (Grade C).
Asymptomatic patients with an unintentional acute ingestion of 50 mg/kg or more or asymptomatic patients who are taking the drug therapeutically and who take an additional single acute ingestion of 50 mg/kg or more of any valproic acid formulation should be referred to an emergency department for evaluation (Grade C).
Patients with unintentional ingestions of immediate-release valproic acid formulations, who are asymptomatic, and more than 6 hours has elapsed since the time of ingestion, can be observed at home (Grade C).
Patients with unintentional ingestions of delayed-release or extended-release formulations of valproic acid who are asymptomatic, and more than 12 hours has elapsed since the time of ingestion, can be observed at home (Grade C).
Pregnant women who ingest below the dose for emergency department referral and do not have other referral conditions should be directed to their primary care obstetrical provider for evaluation of potential maternal and fetal risk. Routine referral to an emergency department for immediate care is not required (Grade D).
Do not induce emesis (Grade C).
Activated charcoal can be administered to asymptomatic patients who have ingested valproic acid within the preceding hour (Grade C). Prehospital activated charcoal administration, if available, should only be carried out by health professionals and only if no contraindications are present. Poison centers should follow local protocols and experience with its use. Do not delay transportation in order to administer activated charcoal (Grades D).
In patients who have ingested valproic acid and who are comatose, naloxone can be considered for prehospital administration in the doses used for treatment of opioid overdose, particularly if the patient has respiratory depression (Grade C).
A benzodiazepine can be administered by emergency medical services (EMS) personnel if convulsions are present and if authorized by EMS medical direction, expressed by written treatment protocol or policy, or if there is direct medical oversight (Grade C).



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MAJOR RECOMMENDATIONS
Grades of recommendation (A-D, Z) and levels of evidence (1a-6) are defined at the end of the "Major Recommendations" field.

Patients with stated or suspected self-harm or the recipient of a potentially malicious administration of an atypical antipsychotic medication should be referred to an emergency department immediately. This activity should be guided by local poison center procedures. In general, this should occur regardless of the dose reported (Grade D).
Patients without evidence of self-harm should have further evaluation, including determination of the precise dose ingested, presence of signs or symptoms of toxicity, history of other medical conditions, and the presence of co-ingestants (Grade C).
Asymptomatic patients without evidence of attempted self-harm, are unlikely to develop symptoms if the interval between the ingestion and the call is greater than 6 hours. These patients do not need referral and should receive follow-up based on local poison center protocols (Grade C).
All patients less than 12 years of age who are naïve to atypical antipsychotic medications and are experiencing no more than mild drowsiness (lightly sedated and can be aroused with speaking voice or light touch) can be observed at home unless they have ingested more than four times the initial adult dose for the implicated antipsychotic medication or a dose that is equal to or more than the lowest reported acute dose that resulted in at least moderate toxicity, whichever dose is smaller (i.e., aripiprazole 15 mg, clozapine 50 mg, olanzapine 10 mg, quetiapine 100 mg, risperidone 1 mg, ziprasidone 80 mg) (Grade D).
All patients 12 years of age or older who are naïve to atypical antipsychotic medications and are experiencing no more than mild drowsiness can be observed at home unless they have ingested more than five times the initial adult dose for the implicated antipsychotic medication (i.e., aripiprazole 50 mg, clozapine 62.5 mg, olanzapine 25 mg, quetiapine 125 mg, risperidone 5 mg, ziprasidone 100 mg) (Grade D).
Patients who use atypical antipsychotic medications on a chronic basis can be observed at home unless they have acutely ingested more than 5 times their current single dose (not daily dose) of the implicated antipsychotic medication (Grade C).
Patients who have ingested less than a threshold dose (see Recommendations 4 to 6) and are exhibiting no more than mild drowsiness can be observed at home with instructions to call the poison center if symptoms develop or worsen. If mild drowsiness is present at the time of the initial call, the poison center should make follow-up calls until at least 6 hours after ingestion. Consideration should be given to the time of day that home observation will take place. Observation during normal sleep hours might not be reliable. Depending on local poison center policy, patients could be referred in to the emergency department if the observation would take place during normal sleeping hours of the patient or caretaker (Grade D).
Any patient already experiencing any signs or symptoms, other than mild drowsiness, thought to be related to atypical antipsychotic medication toxicity should be transported to an emergency department. Transportation via ambulance should be considered based on the condition of the patient and the length of time it will take the patient to arrive at the emergency department (Grade D).
Do not induce emesis (Grade D).
There are no specific data to suggest benefit from out-of-hospital administration of activated charcoal in patients exposed to atypical antipsychotic medications. Poison centers should follow local protocols and experience with the out-of-hospital use of activated charcoal in this context. Do not delay transportation in order to administer charcoal (Grade D).
For patients who merit evaluation in an emergency department, transportation via ambulance should be considered based on the condition of the patient and the length of time it will take the patient to arrive at the emergency department. Continuous cardiac monitoring should be implemented given reports of conduction disturbances associated with this class of medications. Provide usual supportive care en route to the hospital, including airway management and intravenous fluids for hypotension (Grade D).
Depending on the specific circumstances, follow-up calls should be made to determine outcome at appropriate intervals based on the clinical judgment of the poison center staff (Grade D).