Humpty Dumpty had a great fall

All the perfect drugs and superheroes wouldn't be enough to bring me up to zero.

I made a medication error again.
I handed a wrong medicine to a patient.
He found it out himself and brought it to me.
I was lucky he was a good person.

Why am I make so many mistakes?
I think I'm going insane.
I need some help.
It may be the sign of depression.
I want to relieve the stress.