I've commented on this issue throughout the years.....and it's no joke. I am thankful to still have my bladder, and that I don't have any issues anymore.
In my early 20s, I had access to a limitless supply of ketamine. I started out using it with tiny bumps because I was honestly scared to go into a hole, for whatever reason I have no clue lol. Then I accidentally fell into one, and it was amazzzzziiiinnngggggg. Anyway, I was getting it from India for $4/g, flipping it from $30-$120/g.....so I was making fuck tons of money and everything was free. I started sniffing bigger lines, and the tolerance raises quickly. After a while I was sniffing 2g at a time and barely feeling it. Obviously I was using a lot at that time and my nose was not happy. I was at a festival and remember the first time seeing my septal perforation.....a tiny pinhole through my septum. I still continued to sniff it for a while, before switching to IMing it.
IMing was great at first because it was like I didn't have a tolerance anymore.......and then it built up after so long. I was eventually using 100, yes one hunded, gram every week. 2 grams at once split by 5 needles at once, injecting to my hips, thigh, ass, arms, wherever. Not only did I have a horribly swollen, bruised body, and a hole in my nose, but then started the urinary issuse......and the excrutiating k pains in the sternum. This started long before I got up to those insane amounts though.
I would literally piss out ketamine, like a discharge.....it was horrible. I would piss blood clots. I had to piss, or at least felt like I needed to every two seconds. And when I did, it was usually only a couple extremely painful drops. Eventually I couldn't go anywhere because I had the feeling to piss all the time. I missed some serious music gigs that I was booked for because of it.
That was finally the time that I had to clean myself up. It took maybe two months on my couch. I would have buckets next to me because it was futile to go upstairs to use the bathroom.
Anyway.....long story made short.....I got clean 8 years ago and I have no ill effects, surprisingly and thankfully

I use ketamine maybe once a year now, because it is still so amazing, but when I have it....I still go hard. BUT, I can't do it for long because my body reminds me REAL quick with having pain trying to piss after a couple grams.
I want to be involved in some study somehow, because I'm sure I've done more K than thousands of people should in a lifetime 0_o
Be kind to your body with this, and DCK, MXE, 3-MeO-PCP, and the like. They will do the same thing.
Sending lots of love