1) ROA: oral; 14 mgs

2) onset : 45 minutes

3) effects: increased alertness, clean stimulation, no jitters, no euphoria but positive mood lift, increased ability to concentrate. Very positive clean effects.

4) duration: after 6 hours, I still feel focused, in a good mood.

5) comparison:

5a) RITALIN: the stimulation is similar, but the duration so far way longer. RITALIN used to fade after a couple of hours, while 4f has not;

5b) 3,4-CTMP: I have used 3,4-CTMP for a long time, but unfortunately even at low doses it makes me anxious, while doing cardio it increases my heart rate in a scary way, it has a jittery nasty effect, I felt overwhelmed by it, lasting way too long. Even though it indeed gives a clean stimulation, the sides are unbearable at times. As an appetite suppressant it works wonders, still have to see if 4f shares this property. If dosed properly, I would choose 4f over 3,4-CTMP, undoubtedly.

5c) ETHYLPHENIDATE: way more euphoric and less functional than 4f, also more jittery. 4f wins.

5d) 4-METHYLMETHYLPHENIDATE: clean stimulation, but short-lived. After two or three hours, i was not feeling any clean stimulation anymore. 4f wins.

5e) HDEP-28: excellent stimulation, long-lasting, but due to the triple reuptake inhibition, I had some sexual nasty side effects, similar to those given by SSRIs, e.g. inability of maintaining an erection, even with Viagra or Cialis. It seems that 4f does not inhibit the reuptake of serotonin, so 4f is a winner.

5f) HDMP-28: short-lived clean stimulation, sexual side effects, 4f wins.

6) conclusion: the first impression is very positive. An accurate scale is needed, since it is a very powerful phenidate. Definitely less powerful than 3,4-CTMP (a.k.a. DCMP), but as powerful as one needs for clean stimulation. No serotonin reuptake, no jittery feelings (so far).