C119 Spitting Medicine

Ye Ping threw a Truth Serum into Shen Ao's wine glass.

This was a ___ that Gu Xiaohui had hired someone to buy from overseas. The main ingredient was sodium sulphur. It was a type of barbiturate that had an effect on the brain and the receptors in the spinal cord. It could weaken part of the brain's activity. Removing its inhibition effect, it made people involuntarily open their mouths to speak