2.3.8 4F-MPH

4F-MPH #

Common Nomenclature 4-Fluoromethylphenidate
Street & Reference Names 4FMPH; 4-FMPH
Reference Dosage Threshold 1mg+; Light 5mg+; Common 10mg+; Strong 15mg+; Heavy 20mg+ [Oral, TripSit]
Anticipated: Onset / Duration 30 Minutes / 8 Hours
Maximum Dose Experienced 15mg Insufflated; 15mg+20mg Oral
Form Powder
RoA Oral
Source / Jurisdiction Internet / UK


4F-MPH appeared on the markets in 2015, and quickly became popular in its niche. It fits very much into the functional category; meaning that it induces little or no euphoria, empathy or mood lift, or indeed, any of those edges that make many stims so enjoyable and recreational.

However, there is a significant uplift in terms of energy, alertness and even clarity, and it persists for a very lengthy period. I ought to add here that it is extremely strong at relatively low doses, so caution is the byword.

I used it on a number of occasions, invariably when I had a need to be on my game, yet had been suffering from fatigue or tiredness (mental or physical). For this, it was very much my go-to solution, at least for a year or so.

Whilst I found it to be smoother and less jittery than other stimulants in this particular group, such as EPH, it was one which some people abused and eventually became addicted to. Despite its usefulness in certain scenarios, it is not a chemical to make a habit of.