What is a 4-HO-MET experience like? There is no clinical description, so this article summarises what people report in trip reports and harm reduction sources, and where those reports agree and disagree. Everything below is anecdotal and varies from person to person.
The short version
Across reports, 4-HO-MET is most often described as visual, clear-headed and relatively light on the mind. Users who compare it with psilocin (the active substance in mushrooms) tend to say it feels more visual at a comparable dose, mentally clearer and more functional, and less introspective or heavy. Some describe the visual character as slightly synthetic or digital, compared with the more organic feel they attribute to psilocin.
What people describe
- Visual effects. Geometric patterns, colour shifts, a glow or halo around objects, and closed-eye imagery. This is the most consistently reported feature.
- Body. Dilated pupils, tingling, a sense of lightness. Some report mild nausea during the come-up.
- Mood. Euphoria and laughter are common in reports, especially at lighter doses.
- Perception. Time can feel slower or stretched. Some describe synesthesia, for example music that seems to have colour.
- Mind. Often described as clear and conversational rather than deeply introspective, which is why some people reach for it in a social setting rather than a solitary one.
How the dose changes the experience
Reports group loosely by dose. In Shulgin’s TiHKAL range of 10 to 20 mg, descriptions centre on colour enhancement, a lifted mood and mild visual movement, with the person fully able to hold a conversation. Above about 20 mg, reports describe stronger geometry, more pronounced time distortion and a more immersive state. Above 30 mg the descriptions become more intense and less predictable, and this is where most of the difficult reports sit.
The spread between people is large: there are reports of strong effects at 17 mg and of light effects at 30 mg. That is the main reason reports consistently advise starting low. Our dosing guide shows how these ranges translate to drops.
The course of an experience
Most reports follow the same arc. First effects after 15 to 40 minutes, a come-up of 30 to 60 minutes, a peak that lasts 2 to 3 hours, and a total duration of 4 to 6 hours. For the 4-PrO-MET version, which the body first converts into 4-HO-MET, reports describe a later onset and a longer duration of about 6 to 8 hours. Many people mention an afterglow afterwards, a calm or content feeling that can last from a couple of hours to the rest of the day. At lighter doses the peak is often shorter, with a clear decline 3 to 4 hours after intake.
Difficult experiences
Not every report is positive. Anxiety, confusion and nausea appear in a minority of reports, usually at higher doses, in a poor setting, or when the substance was combined with alcohol or other drugs. Published medical literature on 4-HO-MET is limited; one case report describes a hospital admission with psychotic symptoms after an estimated 100 mg, far above any range in the literature.
The factors that come up again and again in reports of difficult experiences are the same ones covered in our article on set and setting: a stressed state of mind, an unfamiliar or busy environment, no sober person around, and a dose chosen too high too early.
Who should not use it
Do not use 4-HO-MET if you are under 18, pregnant or breastfeeding, have a history of psychosis, schizophrenia or bipolar disorder, have a cardiovascular condition, or take SSRIs, SNRIs, MAOIs or lithium. Do not combine with alcohol or other drugs.
Disclaimer: this article summarises anecdotal reports for informational purposes and makes no claims about effects. Psilo Drops are sold for research purposes and are not for human consumption. For persons aged 18 and over. This product is not a medicine and is not intended to diagnose, treat, cure or prevent any disease. Sources: Shulgin, TiHKAL entry 21; PsychonautWiki 4-HO-MET; NMS Labs monograph 2019.