the level of poison contained in a drug, or the ability of a drug to poison the body

The patient displays signs of hypothyroidism due to drug toxicity. 因为药物的毒性，患者出现了甲状腺功能衰退症状。

Tests of the chemical have shown that it has a high level of toxicity. 对该化学品的检测表明，它的毒性很大。

The toxicity of the drug severely limits its use. 这种药品的毒性极大地限制了它的使用。