2.3.24 TPA


Common Nomenclature Thiopropamine
Street & Reference Names N/A
Reference Dosage None Available
Anticipated: Onset / Duration 5 Minutes / 8 Hours
Maximum Dose Experienced 120mg
Form Powder
RoA Insufflated
Source / Jurisdiction Internet / UK


First synthesised in 1942, TPA didn’t appear on the markets until early in 2016, shortly after the UK ban on the structurally similar MPA. This came just weeks prior to the implementation of the Psychoactive Substances Act, which made its sale and import unlawful (although not its possession).

I only found time to test it after the ban came into force, and wrote the following report the day after my initial experiment:

I finally tested this one last night. Despite the mixed and sometimes ambiguous reports I dosed at 120mg, via lines of 20, 25, 25, 25 and 25, which were insufflated over several hours.

I started what probably constituted a mini-binge at about 4pm. The lift on the first 20mg was rapid, and was really quite nice. Nose burn was evident, but I’ve certainly felt worse.

This was quite functional, but with some euphoria and a slight empathogenic edge, which brought with it a little horn. I must say that, generally, I enjoyed it.

It is quite a long time since I sampled MPA, so this probably has to be taken with a pinch of salt, but it did seem to be a little smoother. A number of amphetamine-like qualities were present, adding to its recreational value.

I was able to consume a light meal in the middle of the ride, which I can’t normally face on stimulants, and I had some vitamins earlier in the day, which probably helped what was a reasonably soft comedown. By 11pm it was fading, and I’d had enough. As I was going to be busy the following day (today) I had a little etizolam and slept like a baby.

On waking this morning I felt pretty good, possibly feeling the tail end of the experience.

Overall, I had an agreeable evening, and indeed, I now regret not stocking more than a single 1g baggy prior to the ban. I should also add that this would have made for a very pleasant sojourn on a much lower dose than I experimented with.

On the basis of my tests, this appeared to be more than just a legal replacement for MPA. It delivered a positive experience in its own right.

Despite arriving on the market late in the fray, I have no idea why it wasn’t more popular than it was. It has now, of course, largely passed into the annals of history, as a minor player during the dying embers of the legal high years.

TPA arrived late on the scene, missing the opportunity to become a major force in the legal high market

TPA arrived late on the scene, missing the opportunity to become a major force in the legal high market