My experience on this was:
I was functioning perfectly in sexual therms (libido and erections like always very very veeeeeeeeeeeeeeeery high). I decided to try it because I wanted to stop smoking and my orgasm pleasure was like 5/10, so why not?
At the first 10 days i felt like i was in mania: everything was very, very good. orgasms were 12/10 - amazing shit, just almost fainting from them. Music was absolute masterpiece - it could be Baby Shark and felt like it was written by Bethoven ft. Mozart.
My mind was racing like a rocket, but was mainly euphoria and mania. Emotional blunting was already there and it gave nothing on this field. Just at that time I was flirting with what i felt like my twin soul, and just wasn’t exactly hyped by that. But fuck it. My orgasms (and eargasms) were WONDERFUL. Just like when i listened to music when drunk plus weed high. And music and woman were what i liked MOST.
at the 10th day, overnight, i lost all my functions, I mean ALL. I woke up and my soul was taken apart from me. i continued for like 1 more week and all symptoms worsened. So i quited it cold turkey (my psychiatrist authorized that).
since then i am here, left with all those symptoms i had that day and some ~20 new others. pure hell, a legit nightmare. it’s been a year and a month.