I heard the nasal Ketamine spray is cheaper than the IV Ketamine infusions.

Why wouldn‘t everyone take that then as one reads mostly that one can‘t afford Ketamine therapy because of the price. 

I‘d be very happy if you could answer me following questions:

1. What are the differences between the Ketamine IV therapy and the Ketamine nasal treatment? Just that at IV you‘re accompanied and controlled by docs in a standardized environment? Or are there other differences?

2. Also, if you have experience with Ketamine for depression and/or social anxiety: 
- What were your experiences with it so far?
- What dose, how often?
- When did Ketamine start working and showing significant effects?
- What would you describe the effects like? Regarding depression/mood, anhedonia, motivation/drive, energy, sociability (talkativeness, will to go out do things and socialize more), cognition and so on? Were the effects subtle or significantly occuring and profound (=life changing?)?