1. Synthetic Cannabinoids
Man-made chemicals that activate the CB receptors(1) in a similar fashion to cannabis/THC, but at a much more extreme level. Basically, to sum it up in an analogy, Synthetic Cannabinoids are to THC as smoking Meth is to taking an Adderall. Most people don't enjoy them and end up having horrible panic attacks due to how overwhelming it is, and some people end up liking them FAR TOO MUCH and becoming hopelessly addicted to them despite the fact they aren't really that fun. The names don't matter, they all represent the initials of their creator alongside a random number, which has nothing to do with it's potency. AM-2201 is the most powerful closely followed by JWH-018, and the mildest is JWH-250
Examples:
JWH-018 (Original Cannabinoid, now illegal in the US but not Canada and some of Europe)
AM-2201
JWH-250
JWH-007
AM-2233
AM-1220
HU-210
JTE-907
Hundreds and hundreds more.
2. MDMA-like empathogenic(2), serotonin-dopamine releasing stimulants.
These are the kind of stimulants that make you feel an incredible urge to socialize and get to know people. When Serotonin is released with dopamine, all of the dopamine motivation goes toward the desire to be close with people. They're not sex drugs, they're love drugs. But, if you overdo them, they'll cause a FAR worse crash and withdrawal than regular old stimulants will.
Examples:
4-FA(illegal in UK, legal in US)
Methylone(now illegal in US)
Mephedrone(illegal in US)
6-APB
5-APB
4-FMA
Ethylone(Kind of. It's dysphoric on it's own but can turn any normal stimulant in to an empathogen!)
Any of the many unknown still-level MDxx compounds.
3. Meth-like dopamine preferring stimulants.
These RCs are just regular stimulants like Adderall or meth, only with different potencies.
Examples:
2-FMA(all of the number-Fxx drugs are illegal in the UK and legal in North America)
2-FA
3-FA
Butylone
MDPV(Now illegal in US)
4. LSD-like Psychedelic Phenethylamines(3) AND Ketamine-like Dissociatives
These, I have no personal experience with myself, but they're all 5-HT2a receptor agonists or partial agonists, just like LSD, magic mushrooms, and DMT are.(Except methoxetamine and the DMTs/PCPs) As with all psychedelics, they can be incredibly euphoric or dysphoric depending on whether or not you have a bad trip.
Examples:
2c-e
2c-i
2c-b
(Any compound beginning with "2-c")
DOI
DOB
DOA
25i-NOMBe
All of the above are 5-HT2a psychedelics, all of the below are NMDA antagonist(4) dissociatives and should be used with the same caution as the other psychedelics)
4-MeO-PCP
5-MeO-PCP
Methoxetamine
Many, many other PCP derivatives.
DISCLAIMER: Despite the name "Research Chemicals", any and all of these chemicals except for the major ones such as Methylone and 4-FA have VERY little research on their toxicity and MAY have unknown properties such as carcinogenic-ness and neurotoxicity, though this is unlikely due to the fact their mechanisms are so similar or even exactly the same as well researched drugs. That's the whole "legal" drug catch here, you get them cheaply and legally while putting forth some risk. If the risk is not worth it to you, don't fucking do it. Many of these chemicals are sold with the label "not for human consumption" to protect the vendors from legal issues when/if some idiot dies using what they sell. Don't buy mystery blends, always know what you're getting, pretty much all RC deaths I've seen have been due to mystery blends of shit.
Footnotes
- CB Receptors - CB1 and CB2, the brain receptors that mediate the effects of Cannabis and it's synthetic cousins. More on this topic here.
- Empathogenic - Drugs that increase empathy and urge to socialize.
- Psychedelic Phenethylamines - Classic psychedelics, and their newer RC cousins. LSD, psiliocin(chemical in magic mushrooms), the 2c series and the DOx series.
- NMDA Receptor Antagonist - Dissociative drugs and their RC cousins. Ketamine, PCP, RC PCP derivatives, DXM in high doses, Methoxetamine, and some Alzheimers drugs such as Memantine.