I strongly disagree. Brew up a tea of five cigarettes and drink it. You will die. Nicotine is technically a nerve poison.
From Wikipedia:
The pharmacological and behavioral characteristics that determine tobacco addiction are similar to those that determine addiction to drugs such as
heroin and
cocaine.
The LD50 of nicotine is 50 mg/kg for rats and 3 mg/kg for mice. 40–60 mg (0.5-1.0 mg/kg) can be a lethal dosage for adult humans.[25][26] This designates nicotine as an extremely deadly poison. It is more toxic than many other alkaloids such as cocaine, which has an LD50 of 95.1 mg/kg when administered to mice. Spilling a sufficient concentration of nicotine onto the skin can result in poisoning or even death since Nicotine readily passes into the bloodstream from dermal contact.
[27]
There has never been a documented human fatality from marijuana.
[9] Information about THC's
toxicity is derived from animal studies. The toxicity depends on the route of administration and the laboratory animal. Absorption is limited by
serum lipids, which can become saturated with THC, mitigating toxicity.
[10] According to the
Merck Index, 12th edition,
THC has a LD50 (dose killing half of the research subjects) value of 1270 mg/kg (male rats) and 730 mg/kg (female rats) administered orally dissolved in sesame oil.[11] The LD50 value for rats by inhalation of THC is 42 mg/kg of body weight.[11] One estimate of Cannabis's LD50 for humans indicates that about 1500 pounds of marijuana would have to be smoked within 15 minutes.[12] This estimate is supported by studies which indicate that the effective dose of
THC is at least 1000 times lower than the estimated lethal dose (a "safety ratio" of 1000:1). This is much higher than alcohol (safety ratio of 10), cocaine (15), or heroin (6).
[13]
AnimalAdministrationLD50 [mg/kg]ratoral666
[10]rat (male)oral1270
[11]rat (female)oral730
[11]ratinhalativ42
[11]ratintraperitoneal373
[10]ratintravenous29
[10]mouseintravenous42
[10]mouseoral482
[10]mouseintraperitoneal168
[10]monkey (
LDLo)intravenous128
[10]dogoral525
[10]