That depends on your point of view and what body part your focusing on. For the Central Nervous system the most dangerous drug would probably be barbiturates. Crack Cocaine is also very dangerous, as are Hallucinogens (LSD, PCP, Magic Mushrooms) Amphetamines are also very dangerous. Whether they are legal amphetamines (Adderall) or illegal amphetamines (methamphetamine.)
A hallucinogen. Most are dangerous. People abuse these to escape from what they perceive to be a painful reality, rationally or not.
death.
Nuclear is the most dangerous type of energy
The most dangerous type of rhino is the black rhino.
meth!
Thunder is not dangerous; it is merely sound. It is lightning that is dangerous. The most dangerous type is cloud-to-ground lightning.
weed
opiods and benzodiazepines
yes. cigars and pipe tobacco are dangerous. anything with a type of drug is dangerous to your body...my advise...dont start
Drug-induced hypoglycemia, a complication of diabetes, is the most commonly seen and most dangerous form of hypoglycemia.
hallucinogens
Alcohol and Robotussin.