Long-term, heavy ketamine use is associated with memory problems, depression and anxiety. The drug may also cause gastrointestinal problems, abdominal pain popularly known as “k-cramps” and uropathy, which is a blockage in the urinary tract that can lead to infections, or UTIs.

The world's richest man and tech giant Elon Musk denied that he was addicted to ketamine, mushrooms and ecstacy. He admitted to using ketamine years ago.