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No K-Hole, Just a Hellish Substance Up My A-Hole
2-Fluorodeschloroketamine
Citation:   Tukker. "No K-Hole, Just a Hellish Substance Up My A-Hole: An Experience with 2-Fluorodeschloroketamine (exp118962)". Erowid.org. Jun 2, 2025. erowid.org/exp/118962

 
DOSE:
T+ 0:00
100 - 120 mg rectal 2-Fluorodeschloroketamine  
  T+ 1:30 300 ml oral Tea  
  T+ 0:00 150 mg oral Pharms - Bupropion (daily)
BODY WEIGHT: 65 kg
Dosing:
T-7:00 150 mg bupropion sustained release tablet, oral (daily)
T+0:00 103 mg 2-FCDK (120 mg 2-FCDK HCl crystals), rectal
T+1:30 300 ml green tea, oral

Previous experiences: alcohol, cannabis, several psychedelic and stimulant substances, some nootropics.

Set and setting: at home alone, feeling slightly depressed. I think I have undiagnosed cyclothymia. Bupropion helps a lot with this but some days I still feel quite unwell. The day before my mood started to worsen again. I decided to try a dissociative for the first time, knowing that I would probably not be having a good time, but hoping for some therapeutic effects afterwards.

The drug was sold to me as 100 mg 2-FCDK, but the packaging said 120 mg 2-FCDK HCl.
The drug was sold to me as 100 mg 2-FCDK, but the packaging said 120 mg 2-FCDK HCl.
I assumed the 120 mg included the HCl, this would come down to 103 mg 2-FCDK. I didn't weigh the substance, in hindsight I should have done so. I did buy RC's from the same vendor before and the mass of the other substances checked out. The substance consisted of small clear crystals, with perhaps a hint of yellow/brown colour. I decided to plug it as I tend to do with tryptamines, but was unsure about the dosage. There are not many reports on 2-FCDK, so I decided to make a comparison to regular ketamine and rely on dosages reported for that substance.

After doing some calculations, I concluded that administering all of the substance rectally would be on par to about 160 mg of regular ketamine administered orally, or at least something in the range of 138-208 mg, depending on oral and rectal availability. This is a common dose for ketamine, so I decided to take it all in one go. This only takes into account biological availability and disregards the higher peak experienced through rectal administration. There should be no interaction with the bupropion taken earlier in the day.

T-0:20 I finish having lunch. I ate slightly less than I normally would, to reduce the chance of bodily discomfort during the trip.

T-0:10 I prepare some green tea. Apparently ketamine can harm the urinary tract and EGCG in green tea can counter this effect. This apparently only relates to heavy or frequent dosages, but for sake of harm reduction I thought: why not? Then I take a dump to prepare for the plug.

T+0:00 Plugged 103 mg 2-FCDK dissolved in 1 ml lukewarm tap water. No burn, nothing out of the ordinary.

T+0:05 Feeling pretty lightheaded, swaying a bit while walking.

T+0:07 I attain an erection. I assume this to be a sign of relaxation, as I read ketamine actually reduces libido. It wears off in a few minutes.

T+0:08 Feeling quite drunk. I'm walking with my arms spread out in front of me to keep balance. There seems to be more mental clarity than with alcohol though. I might be wrong about this, since it has been over 10 years since I've gotten drunk on alcohol.

T+0:14 I lay down on the couch in my living room and turn on some music. I take some sips of my green tea. Not really feeling the music, even though this song was stuck in my head earlier. I turn the volume down a bit. Then a bit more. I really can't stand this. I turn off the music.

I wonder if I calculated the dose wrong. My memory is failing now, at first I can only think of some numbers without a meaning attached to them. Then I concentrate for a bit and conclude that the calculation should be correct.

T+0:17 This is getting pretty intense. I decide to lay down on my bed. I want to bring a glass of water and my phone with me but it takes quite some effort to coordinate all this.

I lay in agony for almost half an hour. There is a high-pitched ringing in my ears. I feel like my mind is being torn apart.
I lay in agony for almost half an hour. There is a high-pitched ringing in my ears. I feel like my mind is being torn apart.
I lay on my side in case I pass out and have to vomit. The sensation I'm feeling is mostly in my head and reminds me of being really drunk and wanting to sleep, but being unable to because of the intoxication. I just close my eyes and wait for this to be over. I grab my phone a few times to make notes of the thoughts that cross my head. This requires a lot of effort and I make plenty of typing mistakes. One of the things I type out is something like "I have been torn into pieces".

T+0:47 I feel nauseous. I get up and wonder if I have to vomit. I quickly walk over to the toilet, turn up the seat, kneel down, embrace the toilet and start heaving. There goes most of my lunch. Luckily no vomit enters my nasal cavity. I drink some milk to neutralise my throat and oesophagus. I take some peppermint but spit it out again because I feel it's making me nauseous.

I feel a bit better and return to the living room to lay on the couch. I take some notes and zone out a bit.

T+1:13 I feel nauseous again. I empty my stomach once more. This time it's only milk with some stomach acid. I drink some milk again.

I return to the couch and drink the remains of my green tea. After a while I go to bed to take a nap. I think I slept for about 50 minutes (I checked my bedside clock before and after), but looking at my notes there seems to be 1,5 hours unaccounted for. I may have slept a bit on the couch as well.

T+4:00 I'm past the offset now and a bit irritable. I eat a slice of raisin bread and notice the bitter taste of the toasted malt flour that I hadn't before. The 'new smell' of the sweater I'm wearing that I bought the day before is really getting to me and I decide to take it off, even though I've been wearing it for hours.

Later on I don't feel like making dinner myself even though I function well enough to do it. I decide to order some comfort food to treat myself after this whole ordeal. I choose pasta, one of my favourites that I rarely eat, and take a short walk to the restaurant to collect it. It was nice.

Normally I only shower after exercise, but I decide take a warm shower right before going to bed to rinse myself of this experience.

Sleep was good. I woke up way too early, but that has been happening a lot lately. Still feeling some residual effects, but generally I feel quite refreshed.

Analysis

During the peak of the experience I seemed to be distanced from my emotions a bit. While I was terrified for most of the time, I seemed to experience this feeling second-hand as if watching a movie. This realisation occurred to me while it was happening and I was thankful for it, as it probably made me suffer less. This must be part of the cognitive disconnection that dissociatives bring.

The vomiting was also a bit surreal. If there's one thing I hate, it's throwing up. The last time must have been over 10 years ago, alcohol-related. But when I realised I probably couldn't keep it in, instead of panicking, I marched over to the toilet like a machine and did my thing. You gotta do what you gotta do.

Just after laying down in bed during the come-up I really felt like I was dying. I knew that ketamine can induce near-death experiences, but after reading up on it afterwards, that was not what I had experienced. It just happened to be the worst experience of my life, that's all.

There was no physical or visual disconnection during the peak. I also did not experience visual effects besides some difficulty in reading and an aversion to light. I had darkened my living room and bedroom beforehand so this was generally not an issue, but when I took a look outside it hurt my eyes. There was no pupil dilation.

I don't think I even have to elaborate on this, but this was obviously a +++ on the Shulgin scale, or should I say ---? "The subject is totally engaged in the experience, for better or worse." Yeah, it was for the worse this time.

I have no desire to ever use this substance again, or any dissociative for that matter. The best thing I got out of this is a new reference point of how bad I can possibly feel. No matter what I endure, I can always think back to that one time I took ketamine (sic). Life isn't so bad.

Exp Year: 2025ExpID: 118962
Gender: Male 
Age at time of experience: 33
Published: Jun 2, 2025Views: Not Supported
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2-Fluorodeschloroketamine (778) : Difficult Experiences (5), First Times (2), Alone (16)

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