Is there any medicine that grow more hair...?lol?

Question

I mean on the chest

Answer 1

its called puberty.

Answer 2

The only way is to increase testosterone, which may or may not increase body hair on the chest, or other parts of the body.  It can be random. A weak steroid is DHEA.  This is a hormone that increases testosterone.  You have to be 18 to buy it.  It's an option to try... but not guaranteed.