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ld50 for lamotrigine
thipental
The radiation LD50 of most insects is far higher than the LD50 of mammals.
LD50 (short for lethal dose 50) is the dose of a substance at which it kills 50% of test subjects.
that's not true, in fact magnesium sulfate has been tested on rats and dogs, and it does have an ld50.
"The LD50 values were 206 mg/kg for males and 174 mg/kg for females"