This is interesting info. You know, when you hear about overdoses on TV shows, etc., you tend to picture the victim getting transported to the ER and getting his or her stomach pumped and sent away. Guess not. David Bradley at SciScoop found this info in a psychiatric reference:
The vast majority of substances of abuse have no antidote:
Alcohol – Potential lethal dose: 350–700 mg (serum)
Amphetamines – potential lethal dose: 20–25 mg/kg
Barbiturates: Short-acting (Potential lethal dose: >3 g); Long-acting (lethal dose: >6 g)
Non-benzo hypnotics – lethal dose varies with tolerance
Hydrocarbons (lighter fuel, aerosols, glue etc) can kill instantly
Phencyclidine/ketamine cause many problems and have no antidote
Salicylates – Potential lethal dose: 500 mg/kg
Tricyclics – Potential lethal dose: 35 mg/kg
Nicotine – Mortality rates in the medium term are high
Read his whole blog entry here: www.sciscoop.com