0_Apprentice
I drink energy drinks that contain caffeine.  Can you elucidate on the pros and cons of caffeine consumption?
1_Wizard
Well caffeine is legal and unregulated almost everywhere, unlike other psychoactive substances, so that sure is a con.
0_Apprentice
i sometimes feel out of it when i drink too many, almost like an overdose.  Is there a limit on how much caffeine i should consume?
1_Wizard
Definitely, caffeine is a psychoactive drug and should be consumed in limited quantity. The exact amount depends on the person though.
0_Apprentice
You are saying that caffeine is a drug like heroin?  I wish that i had known this years ago.  I am an addict.
1_Wizard
That's right, a psychoactive drug is any psychotropic chemical substance that changes brain function. It can change mood, perception, consciousness or behavior too.
0_Apprentice
Now i am getting anxious thinking about where i am going to get my medicine.  I may have to walk to the store and see them man who supplies me with energy drink.