Quick info
Monkey Dust is a collective term for cathinones in the pyrovalerone group. Today, this term is most commonly used to refer to MDPHP (3’,4’-methylenedioxy-α-pyrrolidinohexiophenone), and in some cases also to similar synthetic cathinones in the pyrovalerone group, such as alpha-PiHP or alpha-PHP. This class of substances belongs to the amphetamine-like stimulants and traces its origins back to the 1960s, the same period from which the closely related MDPV also originated. MDPHP did not appear on the market as a new psychoactive substance until much later and became popular in part as a substitute after MDPV was banned. Since the same term can refer to different substances with similar effects but sometimes very different potencies, it does not indicate the actual content. Other common street names include “Alpha” or “Pyros.”
Pharmacologically, MDPHP acts primarily as a norepinephrine-dopamine reuptake inhibitor (NDRI). This increases the concentration of these neurotransmitters in the brain, leading to its strongly stimulating and activating effects.
MDPHP is a powerful stimulant whose effects are described as highly stimulating and euphoric. Typical effects include a feeling of increased energy combined with heightened alertness, concentration, and motivation, as well as increased self-confidence. Users also frequently report increased talkativeness, a more intense perception of music, and an increased libido. In addition, accelerated thoughts and a feeling of physical lightness may occur. Compared to other stimulants, the effects often last significantly longer and are described as very intense and, in some cases, difficult to control.
MDPHP is typically smoked, but it can also be snorted or swallowed. Rectal or intravenous use is also possible in principle, but it carries greater risks and has been less well studied. If these methods of use are chosen, one should start with a low dose.
Onset of effect
Smoked: after about 1–5 minutes
Snorted: after about 5–15 minutes
Swallowed: after about 30–60 minutes
Duration of action
Smoked: 1–4 hours
Snorted: 2–4 hours
Swallowed: 3–6 hours
Aftereffects
Smoked: 3–8 hours
Snorted: 2–36 hours
Swallowed: 2–16 hours
Warning: This information applies only if the substance is actually MDPHP. “Monkey Dust” may contain other pyrovalerones with significantly different potency levels. MDPHP is one of the most potent stimulants in existence and is effective even in milligram doses. The margin between the desired effect and an overdose is very narrow. Keep your dose low, weigh it precisely using a precision scale, and do not take another dose too soon.
Smoked
Mild: 1–5 mg
Medium: 5–10 mg
Strong: 10–20 mg
Snorted
Mild: 5–10 mg
Moderate: 10–20 mg
Strong: 20 mg +
Mild: 10–20 mg
Moderate: 20–40 mg
Strong: 40–60 mg
Forms of appearance: Crystalline powder
MDPHP places a heavy strain on the cardiovascular system and can lead to an increased heart rate and blood pressure, as well as vasoconstriction. Other common symptoms include loss of appetite, teeth grinding, muscle cramps, changes in body odor, and frequent urination. Sexual dysfunction may also occur.
Psychologically, restlessness, anxiety, and paranoid thoughts often occur, especially at higher doses or with prolonged use. This can lead to impaired thinking, a loss of touch with reality, disinhibition, and overconfidence. At high doses, the risk of psychotic episodes increases significantly.
In addition, severe physical and psychological reactions may occur: These include panic attacks, aggression, difficulty breathing, and a feeling of pressure or discomfort in the chest. Elevated blood pressure and altered perceptions (e.g., hallucinations) are common. Dangerous physical stress responses, such as a sharply elevated body temperature, a very rapid pulse, and severe mental crises, may also occur. In isolated cases, serious problems with the heart or the nervous system may arise, such as confusion, tremors, or seizures.
A typical effect of MDPHP is intense craving (the urge to take another dose). As a result, users often lose track of time and neglect basic needs such as eating, drinking, and sleeping. After use, users frequently experience a distressing “come-down” characterized by exhaustion, a depressed mood, sleep problems, and difficulty concentrating—sometimes lasting for several days.
MDPHP has a high potential for dependence and poses an increased risk of health damage, particularly with repeated use or when combined with other substances. MDPHP is considered particularly potent and high-risk. At the same time, the available data is limited: very little is currently known about the toxicity, pharmacology, and metabolism (breakdown in the body) of MDPHP. Combined with the often unclear composition of new psychoactive substances (NPS), the effects, side effects, and long-term consequences can therefore only be assessed to a limited extent and are sometimes difficult to predict. Individual factors such as dose, method of use, and physical and mental state can also significantly influence the risks.
Since 2023, cathinones such as 2-MMC, 3-MMC, and 4-MMC have become more widespread again. Since 2025, we have observed an increase in the number of samples submitted for drug testing that are labeled as “Monkey Dust.”
This trend could be related to the fact that, for example, 3-MMC has hardly been analyzed since mid-2025 and is now rarely, if ever, available on the black market. As a result, people are increasingly turning to other new psychoactive substances (NPS) such as MDPHP, as these are currently easier to obtain.
With regard to mislabeling and cutting agents, no definitive conclusions can be drawn at this time due to the currently small number of samples. However, it is likely that in the future, other cathinones will increasingly be detected in samples labeled as “Monkey Dust,” or, conversely, that samples labeled as “Monkey Dust” will in fact contain a different cathinone.
If you or someone else needs urgent help after taking drugs or alcohol, call an ambulance on 144. Tell the emergency responders everything you know.
It could save lives.
