4f-Mph
The short answer. There isn't much data on 4f-Mph yet — 8 mentions, 3 with a clear outcome — so treat these numbers as anecdotal. We found no human trials on PubMed.
Out of 8 mentions; the other 62% didn't say how it went and aren't counted.
What 4f-Mph does, according to users
Of the people who reported each effect, the share who said it got better.
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
No randomized controlled trials in humans found on PubMed. The grade measures how much human research exists — read the conclusions below for what it found.
Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
Reported side effects
How often each side effect came up across all reports.
What users say
First-hand experiences, quoted verbatim. We show one positive and one negative where both exist.
“4f-mph for sure worked wonders for me. found it to be an outstanding study aid without as many side affects as adderall.”
“4F-MPH somehow fucked up my bladder back in the day believe it or not.”
Top discussions (5)
- Why is there no clinically available dopamine d1 agonist ↗
- Effective and legal derivatives similar to ADHD medication ↗
- Nootropics similar to adderall, I have tried Oxiracetam , Phenylpiracetam, modifinal. I am prescribed adderall 30 mg x2 daily but would like to have something to alternate with to help with tolerance buildup or when on occasion.I run out of my meds early. ↗
- What's a good rc replacement for adderall? ↗
- What pairs well with methylphenidate? ↗
Other options for focus
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 3, 2026. How we rate