Cannabis and LSD are hardly a poison.
"TETRAHYDROCANNABINOL:
TOXICITY DATA: 666 MG/KG ORAL-RAT LD50; 482 MG/KG ORAL-MOUSE LD50; 525 MG/KG
ORAL-DOG LDLO; 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; REPRODUCTIVE EFFECTS DATA
(RTECS); MUTAGENIC DATA (RTECS); TUMORIGENIC DATA (RTECS).
CARCINOGEN STATUS: NONE."
Toxicity data (for LSD-25)
(The meaning of any toxicological abbreviations which appear in this section is given
here.)
ORL-HMN LDLO 0.0007 mg kg-1
IVN-RAT LD50 16 mg kg-1
ORL-BWD LD50 1.8 mg kg-1
Toxicity data (for Ascorbic Acid or Vitamin C)
(The meaning of any abbreviations which appear in this section is given
here.)
ORL-RAT LD50 11900 mg kg-1
ORL-MUS LD50 3367 mg kg-1
IVN-MUS LD50 518 mg kg-1