Did you provide Mr. Lahey with the potentially lethal drug secobarbital?

你是否为勒西夫人提供了可能会致命的药物，司可巴比妥？

" The blood-drug-screen test found no trace of secobarbital or any other potentially lethal medication in Mrs. Lahey's sample."

“勒西女士的血药检测中，没有发现司可巴比妥或其他潜在致死药物。”

Isn't that also the same amount of time it takes a lethal dose of secobarbital to kill someone?

这与服下司可巴比妥之后药效发作致人死亡的时间是否吻合呢？