I can tell you with certainty I've seen test subject make the same remark as OP after a 250mg dose. It's not much different than at 200mg, but much more enjoyable it seems than 50mg. And it's a batch of 99.7% pure 2-FA. Also, research subjects have taken it, under supervision, every morning before breakfast for over 7 days then abruptly stopped. No side effects were seen or noted except 1. That first night after not dosing in the morning they all slept for 11 hours on average. But then woke up feeling alert and totally functional. We'll have to wait for blood and urine screens to come in, but I have a feeling 2-FA has very little serotonin toxicity even after multiple use, which directly contradicts several posts about it. More research needs to be completed but at this time the results of this test came back with positive remarks about this chemical, it's affects and side affect.I mean no disrespect to the poster of this thread. I am just I am wondering if there has been a simple mix up of chemical names if maybe this could be cleared up to avoid false identification and overdosing? 2-FA (2-FluroAmphetamine or IUPAC Name: (RS)-1-(2-Flurophenyl)propan-2-amine) isn't a cathinone in structure. It doesn't have a ketone group and is rather an amphetamine in structure. (Anyone interested can have a look at acetone on wikipedia which is the simplest ketone molocule. You can also then look at bk-MDMA (methylone) and compare to normal MDMA to see the difference between a cathinone and an amphetamine structure.
The poster reports taking 250mg this seems very high judging by other reports on 2-FA for example here: http://www.bluelight.ru/vb/showthread.php?t=500726. So I am wondering if maybe the substance reported here taken at 250mg is possibly another cathinone substance (such as 4-FMC, 4-MMC or similar) which could account for the much higher dosage and possibly shorter duration. Another possibility could be a cut (impure) 2-FA compound. Then again the poster could be taking relatively pure 2-FA @ 250mg. All I want to raise it that others have said 20-50mg is quite a decent dosage for them so please be careful if anyone is unfamiliar with this compound please work your way up gradually.
One more thing to note: all test subjects had prior familiarity with RX based amphetamines (adderall, vyvanse, ritalin) but had not used any sort of stimulant for at least 2 years prior to research and were all in good health and off any med, even OTC. The all reported that 2-FA felt very similar to adderall mixed with vyvanse but had more euphoria on onset (15 minutes on average, taken orally) and a much calmer focused feeling that would last well past 6 hours.
Just wanted to share as the test was recently completed and the results were against my hypothesis.