Homework for college

People, this is a little text for my college. I want know if it is correct:

The rational use of medications

Many people see a pharmacy like a shopping mall where they can buy medications to cure all their health problems.But a simple head pain can represent a serious neurological problem, for example.This is the dangerous.
The careful use of medications is extremely important to avoid health problems caused by excess and over-the-counter drugs are sold like bread in a bakery.
The world conference on the rational use of medications, which took place in 1985, defined the rational use of medictaions for the patients to receive them only according to their needs.
If you have a chronic problem you should take care of it sensibly, don't self-medicate.

An assignment for college

People, this is a little text for my college.I want know if is correct:

The rational use of medications

Many people see the pharmacy like a shop where they can buy medications to  cure all their problems of health.But a simple head pain can  signal a serious  neurological problem, for example.This is the danger.
The careful use of medications is extremely important in order to  avoid health problem caused by excessive use of medication,   since  nonprescription medicines  are sold like bread in a bakery.
The world conference on the rational use of medications, ocurred in 1985, defined the rational use of medictaions for the patients as receiving  them just according to  your needs.
If you have a constant problem, you should  take care of, and not become intoxicated.

I have a question: I use medications or medicines?

You can say both.