Question

________ of painkillers may damage nervous system​

Answer 1

Explanation:

But when we take a painkiller, the drug does two things: First, it depresses the central nervous system, making it more difficult for pain signals to reach the brain. Second, it attaches to opiate receptors to block pain signals coming from the body.

Answer 2

Overuse or regular use of painkillers may damage nervous system.

Hope it will help you.