|Summary sheet: Methiopropamine|
|Molecular structure of Methiopropamine|
|Routes of Administration|
Methiopropamine (MPA) is a thiophene ring-based structural analogue of methamphetamine which was originally reported in 1942. Chemically, it is not a phenethylamine or amphetamine, nor is it their functional analog. It originally appeared for public sale in the U.K. in December 2010 as a research chemical or legal high, recently branded as "Blow". It has limited popularity as a recreational stimulant.
Methiopropamine, or 1-(thiophen-2-yl)-2-methylaminopropane, is a synthetic molecule of the thiophene class. It is a structural analogue to methamphetamine. It contains a thiophene ring bound to an amino (NH2) group through an ethyl chain with an additional methyl substitution at Rα. Methiopropamine contains an additional methyl substitution at RN (similarly to MDMA and methamphetamine). Although methiopropamine is analogous to methamphetamine, it is neither an amphetamine nor a phenethylamine as methiopropamine contains a thiophene ring instead of a benzene ring. Thiophene is a five-membered aromatic ring with a sulphur constituent.
Methiopropamine functions as a selective norepinephrine-dopamine releasing agent. This allows dopamine and norepinephrine to accumulate within the brain, resulting in stimulating and euphoric effects. It is approximately one third as potent as dextroamphetamine as a norepinephrine reuptake inhibitor and one fifth as much as a dopamine reuptake inhibitor. It displays negligible activity as a serotonin reuptake inhibitor.
The effects listed below are based upon the subjective effects index and personal experiences of PsychonautWiki contributors. The listed effects should be taken with a grain of salt and will rarely (if ever) occur all at once, but heavier doses will increase the chances and are more likely to induce a full range of effects. Likewise, adverse effects become much more likely on higher doses and may include serious injury or death.
- Stimulation - In terms of its effects on the physical energy levels of the user, methiopropamine is usually considered to be mildly to moderately energetic and stimulating in a fashion that is considerably weaker in comparison to that of traditional recreational stimulants such as amphetamine, MDMA or cocaine. This encourages physical activities such as performing chores, repetitive tasks which would otherwise be boring and strenuous physical activities.
- Spontaneous tactile sensations - The "body high" of methiopropamine can be described as an intense euphoric, sharp and all-encompassing tingling sensation that remains present through the duration of the experience.
- Increased heart rate - In comparison to other stimulants such as amphetamine or cocaine, methiopropamine only has a mild effect on one's heart rate.
- Appetite suppression The above components are also accompanied by a suppression of appetite which is usually much less intense in strength in comparison to the appetite suppression experienced with amphetamine or methamphetamine.
- Increased perspiration
- Increased libido
- Temperature regulation suppression
- Teeth grinding - This component can be considered to be less intense when compared with that of MDMA.
- Focus enhancement - This component is most effective at low to moderate doses as anything higher will usually impair concentration.
- Cognitive euphoria - This component is much less intense than the euphoria experienced with other stimulants such as amphetamine, cocaine, or methamphetamine.
- Thought acceleration
- Thought organization
- Analysis enhancement
- Motivation enhancement
- Compulsive redosing
- Increased music appreciation
- The effects which occur during the offset of a stimulant experience generally feel negative and uncomfortable in comparison to the effects which occurred during its peak. This is often referred to as a "comedown" and occurs because of neurotransmitter depletion. Its effects commonly include:
There are currently no anecdotal reports which describe the effects of this compound within our experience index. Additional experience reports can be found here:
Toxicity and harm potential
The toxicity and long-term health effects of recreational MPA use do not seem to have been studied in any scientific context and the exact toxic dosage is unknown. This is because MPA has very little history of human usage. Anecdotal evidence from people who have tried MPA within the community suggest that there do not seem to be any negative health effects attributed to simply trying this drug at low to moderate doses by itself and using it sparingly (but nothing can be completely guaranteed).
It is strongly recommended that one use harm reduction practices when using this drug.
Tolerance and addiction potential
As with other stimulants, the chronic use of MPA can be considered moderately addictive with a high potential for abuse and is capable of causing psychological dependence among certain users. When addiction has developed, cravings and withdrawal effects may occur if a person suddenly stops their usage.
Tolerance to many of the effects of MPA develops with prolonged and repeated use. This results in users having to administer increasingly large doses to achieve the same effects. After that, it takes about 3 - 7 days for the tolerance to be reduced to half and 1 - 2 weeks to be back at baseline (in the absence of further consumption). MPA presents cross-tolerance with all dopaminergic stimulants, meaning that after the consumption of MPA all stimulants will have a reduced effect.
Abuse of compounds within the stimulant class at high dosages for prolonged periods of time can potentially result in a stimulant psychosis that may present with a variety of symptoms (e.g., paranoia, hallucinations, or delusions). A review on treatment for amphetamine, dextroamphetamine, and methamphetamine abuse-induced psychosis states that about 5–15% of users fail to recover completely. The same review asserts that, based upon at least one trial, antipsychotic medications effectively resolve the symptoms of acute amphetamine psychosis.
Although many psychoactive substances are safe on their own, they can become dangerous and even life-threatening when combined with other substances. The list below contains some common potentially dangerous combinations, but may not include all of them. Certain combinations may be safe in low doses of each but still increase the potential risk of death. Independent research should always be done to ensure that a combination of two or more substances is safe before consumption.
- Stimulants - MPA can be potentially dangerous in combination with other stimulants as it can increase one's heart rate and blood pressure to dangerous levels.
- 25x-NBOMe - Both the NBOMe series and this compound induce powerful stimulation and their interaction may cause severe side effects. These can include thought loops, seizures, increased blood pressure, vasoconstriction, increased heart rate, and heart failure (in extreme cases).
- Alcohol - It is dangerous to combine alcohol, a depressant, with stimulants due to the risk of excessive intoxication. Stimulants decrease the sedative effect of alcohol which is the main factor most people consider when determining their level of intoxication. Once the stimulant wears off, the effects of alcohol will be significantly increased, leading to intensified disinhibition as well as respiratory depression. If combined, one should strictly limit themselves to only drinking a certain amount of alcohol per hour.
- DXM - This combination may cause increased heart rate and panic attacks.
- MXE - Increased heart rate and blood pressure may occur.
- Tramadol - This combination can increase the risk of seizures.
- MDMA - The neurotoxic effects of MDMA may be increased when combined with amphetamine and other stimulants.
- MAOIs - This combination may increase the amount of neurotransmitters such as dopamine to dangerous or even fatal levels. Examples include syrian rue, banisteriopsis caapi, 2C-T-2, 2C-T-7, αMT, and some antidepressants.
- Cocaine - This combination may increase strain on the heart.
- Finland - Methiopropamine is illegal in Finland.
- Germany - Methiopropamine is illegal in Germany.
- United Kingdom - Methiopropamine is a Class B drug.
- United States - Methiopropamine is not scheduled at the federal level in the United States, but it could be considered an analogue of methamphetamine in which case purchase, sale, or possession could be prosecuted under the Federal Analogue Act. Methiopropamine's structure differs from methamphetamine's structure significantly more than previous successful prosecutions under the same law.
- Florida - Methiopropamine is a Schedule I controlled substance in the state of Florida, making it illegal to buy, sell, or possess in Florida.
- Methiopropamine (Wikipedia)
- Methiopropamine (Erowid Vault)
- Methiopropamine (Isomer Design)
- Methiopropamine (MyCrew)
- α-Thienylaminoalkanes | http://pubs.acs.org/doi/abs/10.1021/ja01255a001
- The syntheses of 1-(2-thienyl)-2-(methylamino) propane (methiopropamine) and its 3-thienyl isomer for use as reference standards. (PubMed.gov / NCBI) | https://www.ncbi.nlm.nih.gov/pubmed/21770051
- Neurochemical profiles of some novel psychoactive substances (ScienceDirect) | http://www.sciencedirect.com/science/article/pii/S0014299912010114
- Treatment for amphetamine psychosis | 
- Treatment for amphetamine psychosis | 
- Hofmann FG (1983). A Handbook on Drug and Alcohol Abuse: The Biomedical Aspects (2nd ed.). New York: Oxford University Press. p. 329. ISBN 9780195030570.
- Treatment for amphetamine psychosis | 
- Gillman, P. K. (2005). Monoamine oxidase inhibitors, opioid analgesics and serotonin toxicity. British Journal of Anaesthesia, 95(4), 434-441. https://doi.org/10.1093/bja/aei210
- United Kingdom. (2017). Misuse of Drugs Act 1971 (S.I. 2017/1114). London: The Stationery Office Limited. Retrieved February 9, 2018, from https://www.legislation.gov.uk/uksi/2017/1114/made