Am I going mad

I woke up last night
And there was a blue rabbit sitting on my bed
"Are you really here? Or are you in my head?"

The rabbit looked amused
And he turned round to me and winked
What is the most likely answer to that
Really what do you think

"Why am I seeing you?"
Can you explain
Yes it's all the drugs you take
For your Parkinson's and your pain

Should I be worried
About these things that I see
No need to worry
Its only insanity

Then he got up and went
Straight out into the hall
You'd better get your sleep in
Before the men with white coats are at the door