Is there a single word which means "comatose with pleasure"?

Solution 1:

I think ecstatic may suggest the "comatose-like" state you are referring to:

• in a trancelike state of great rapture or delight. (Collins Dict.)

Solution 2:

I have been narcotized with pleasure:

transitive verb
1
a : to treat with or subject to a narcotic
b : to put into narcosis

2 : to soothe to unconsciousness or unawareness
_{merriam-webster}

This assumes the secondary meaning of comatose:

1.1 humorous Extremely lethargic or sleepy:
she lay comatose in the sun listening to a personal stereo
_ODO

I remember a time when I was experiencing some scary chest pains. After the doctor ruled out a heart attack, he decided morphine was the best temporary treatment--until they could get at the root of the problem. What a pleasant experience I had, but it was always so short lived, because I was so relaxed I fell asleep!

Any pleasure has the potential to become a narcotic for the human mind:

noun

1 An addictive drug affecting mood or behavior, especially an illegal one:
_ODO

If we overload on any mind-altering activity, we loose touch!

From the poem Narcotized in A Whole Bunch of Words by Jon Glenn:

The early morning sun shines in through a dusty basement window. Now that the night is gone, my day can go on like the last one. I get up on my world, I feel like I slept on pins and needles. The air is cold and damp; I careen By way of my perception...

I drift along in a daze; I feel as if I have been narcotized. I remember the way as I regress in to a photograph.