Both dealing with the adverse effects from therapeutic administration, like when you order it on the floors or take yourself - to the overdose setting. Here is a brief list of the common sleep aids, MOA and toxicity. (Zolpidem or Ambien gets the award for most entertaining adverse effect of "Sleep Eating")
"Unisom": there are multiple formulations, most have diphenhydramine or some derivative. Toxicity is anticholinergic and Na channel blockade in overdose. Be aware that some have doxylamine which causes atraumatic rhabdomyolysis.
Zolpidem (Ambien): Nonbenzodiazepine hypnotic, with sedation as the primary effect though the reports of hallucinations, "sleep eating" and "sleep coitus" have been made famous.
Eszopiclone(Lunesta): Nonbenzodiazepine hyponitic, mechanism of action unknown. Does not require a controlled substance Rx but is expensive. Toxicity: metallic taste next day, minimal toxicity reported.
