LD50 of THC

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LD50 is a value of partial fatality. That is, 50% of test subjects die at said dose.

The following data supports the theory that the THC in marijuana (if not extracted) cannot cause lethal overdose.

TETRAHYDROCANNABINOL TOXICITY DATA:
666 mg/kg ORAL-RAT LD50;
482 mg/kg ORAL-MOUSE LD50;
525 mg/kg ORAL-DOG LD5O;
29 mg/kg INTRAVENOUS-RAT LD50;
42 mg/kg INTRAVENOUS-MOUSE LD50;
128 mg/kg INTRAVENOUS-MONKEY LDLO;
373 mg/kg INTRAPERITONEAL-RAT LD50;
168 mg/kg INTRAPERITONEAL-MOUSE LD50; ^[1]