What is the most dangerous LD 50 value 500 or 17.5?
An LD50 value of 17.5 milligrams would be considered far more dangerous than an LD50 value of 500 milligrams. The LD50 value for any drug or other chemical compound is the minimum lethal dose that kills 50% of test subjects (tests are usually conducted on rats and mice). Thus the lower the value, the more toxic the drug.
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