Workup
Laboratory Studies
In general, laboratory studies do not play a large role in the diagnosis and treatment of hallucinogen poisoning.
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Only a few hallucinogenic agents show up on standard toxicological screens. These include MDMA (positive for amphetamines), PCP, and marijuana.
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Treatment of hallucinogen poisoning is rarely affected by drug screen results.
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Dextromethorphan (as in Robitussin DM) may cause a false-positive result for the presence of PCP.
Metabolic abnormalities should be sought and aggressively treated.
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MDMA may cause hyponatremia.
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PCP and MDMA may cause rhabdomyolysis and subsequent myoglobinuric renal failure. Check the creatine kinase level.
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Always exclude hypoglycemia as a cause of altered mental status.
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Imaging Studies
A CT scan of the head is indicated in all patients with an unexplained alteration in mental status.
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Media Gallery
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Hallucinogens. Claviceps purpurea.
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Hallucinogens. Morning glory (Ipomoea violacea).
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Hallucinogens. Bufo marinus.
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Hallucinogens. Psilocybe coprophilia.
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Hallucinogens. Amanita muscaria.
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