Post-Altered State Euphoria

I guess this question can be posed to many different people and many different scenarios. Those who have had near death experiences. Those in the medical field. Those with mental disorders. Or even recreational drug users who mixed a combination that took them to an altered state. Personally, mine involves a day of drinking. Mixed in with a little drug use. And finally the introduction of Ambien for the first time. The experience was like nothing before. It was as if I had passed on to the next life and was convinced I was gone. But since my return, I have experienced unusually low levels of stress and anxiety. Also, my temper seems to be much improved. Anyone else ever experience such after a somewhat traumatic or life altering event?