https://www.vice.com/en/article/dyp4bq/mdma-doesnt-actually-cause-comedowns-new-study-finds
There are some things that you just accept. Having chocolate for dinner will make you feel sick. Drinking four pints will – increasingly, you’re noticing, as you get older – mean the next day is a write-off. And taking MDMA means that you are most likely in for a comedown.