The prognosis is typically good when medical care is provided and patients adequately treated are unlikely to have any long-term sequelae. However, severely affected patients with prolonged seizures or respiratory failure may have ongoing impairments secondary to the hypoxia. It has been stated that if a patient survives<unk>  during the first 4 hours, they usually recover completely. At least at "normal" levels, as<unk>  in the human body is broken down, it has an approximate biological half-life of 1–2 hours. Cotinine is an active metabolite of<unk>  that remains in the blood for 18–20 hours, making it easier to analyze due to its longer half-life.
Nicotine poisoning
Theobromine poisoning
Carbamate poisoning
Chlorine gas poisoning
Hydrocarbon poisoning
Ethylene glycol poisoning
Salicylate poisoning
Organophosphate poisoning