Discuss how the effects of  using certain drugs can eventually lead to serious medical issues. What effect does heroin have on the levels of dopamine in the human body?

All questions are worth 20 points:

Discuss how the effects of  using certain drugs can eventually lead to serious medical issues. What effect does heroin have on the levels of dopamine in the human body?Please provide examples in your answer.
What effect does heroin have on the levels of dopamine in the human body? How does chronic use of heroin impact stress?
Discuss the effects of ketamine, slavia and Flakka.
Discuss which drugs are often associated with date rape and how they affect a person’s mind and body.  Are there new tools or philosophies used to help prevent date rape, if so give examples?
Debate the pros and cons associated with marijuana use.