But Carson showed how the overuse of chemicals led to the evolution of resistant species — which, in turn, encouraged the development of deadlier chemicals.
You don't probably expect the librarian to come running out from behind the reference desk with Narcan, ready to revive someone overdosing on heroin or fentanyl.
Excess steroid use can also reduce fertility in males and females— by reducing the sperm in semen or by causing missed periods and conditions like polycystic ovary syndrome.