I took between 400-600mg of 4-FA in one dose orally (long story) and it was pretty fucked up. Definitely felt weird and overwhelmed. Heart rate stayed at 120bpm for quite a while. There was a psychedelic edge to it. However, other than the elevated heart rate, I didn't feel like I was in much physical danger. I considered going to the hospital, but I decided to wait a little while and see how I felt. The state remained stable and didn't seem to be intensifying, so I just sat on the couch and watched movies for a while. Gradually I started falling back towards baseline and after a few hours I felt ok (though still not baseline).
In that instance at least, it didn't seem like 4-FA was very dangerous in overdose, although it was definitely uncomfortable and I wouldn't want to repeat the experience. Then again, I had a pretty heavy stimulant tolerance at the time, and had been taking 250mg doses and not even getting very high, so maybe my tolerance saved me to some extent. All things considered, better not to keep a large bag of the stuff around.
In that instance at least, it didn't seem like 4-FA was very dangerous in overdose, although it was definitely uncomfortable and I wouldn't want to repeat the experience. Then again, I had a pretty heavy stimulant tolerance at the time, and had been taking 250mg doses and not even getting very high, so maybe my tolerance saved me to some extent. All things considered, better not to keep a large bag of the stuff around.
