Given altered mental status, key importance of witnesses and EMS recovery of medication bottles
Acetaminophen level (combination cold medicine)
Urine drug screen may be positive for PCP or opioids
Dextromethorphan toxicity
Dextromethorphan
Mescaline toxicity
Ketamine
Cocaine toxicity
Nitrous oxide
Phencyclidine toxicity
Phencyclidine 