The concerns with The use of ketamine

What are the concerns with the use of ketamine? What is nitrous oxide used for? What makes propofol so dangerous?

CNS Stimulants
Amphetamines in general are used therapeutically for?
What are the most common adverse effects?
What are the effects of caffeine?
What is it used for therapeutically?
All CNS stimulants in excess amounts can cause?

Endocrine System

Growth Hormone (Somatropin)
What is it used for therapeutically?
How is its effectiveness measured?
What are its major adverse effects?
How is it usually administered?