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| Other names | 5-OMe-DiPT; 5-Methoxy-N,N-diisopropyltryptamine; Foxy; Foxy Methoxy |
| Routes of administration | Oral, others [1] [2] [3] [4] [5] |
| Drug class | Non-selective serotonin receptor agonist; Serotonin 5-HT2A receptor agonist; Serotonergic psychedelic; Hallucinogen; Entactogen; Stimulant |
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| Onset of action | 20–30 min or ≤1 hour [1] [2] [4] |
| Duration of action | 3–6 hours or 4–8 hours [1] [2] [4] |
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| Chemical and physical data | |
| Formula | C17H26N2O |
| Molar mass | 274.408 g·mol−1 |
| 3D model (JSmol) | |
| Melting point | 181 °C (358 °F) |
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5-MeO-DiPT, also known as 5-methoxy-N,N-diisopropyltryptamine and sometimes as foxy methoxy or simply foxy, is an atypical psychedelic drug of the tryptamine and 5-methoxytryptamine families. [1] [3] [7] It has unique and distinct effects from other serotonergic tryptamines, including some stimulant- and entactogen-like effects, robust tactile and sexual enhancement, and only light hallucinogenic effects. [1] [2] [7] [4] [8] The drug is usually taken orally, but may also be used by other routes. [1] [2] [3] [4] [5]
It acts as a non-selective serotonin receptor agonist, including of the serotonin 5-HT1A and 5-HT2A receptors among others. [9] [10] [11] [12] [13] Uniquely among most tryptamines, the drug has been found to produce serotonergic neurotoxicity and associated cognitive deficits in rodents reminiscent of but distinct from those observed with MDMA. [3] [14] [15] Various severe and/or fatal intoxications associated with 5-MeO-DiPT have been reported in humans. [3] [12] [13] It is the 5-methoxy derivative of diisopropyltryptamine (DiPT) and is an analogue of other psychedelic tryptamines like 4-HO-DiPT, 5-MeO-DMT, and 5-MeO-MiPT. [1]
5-MeO-DiPT was first described in the literature by Alexander Shulgin and colleagues in 1980. [7] [16] [1] [2] Subsequently, Shulgin described 5-MeO-DiPT in further detail in his 1997 book TiHKAL (Tryptamines I Have Known and Loved). [1] The drug was first encountered as a novel designer drug in 1999. [3] [4] It is used recreationally as a "party drug" and sexual enhancer, with notable use among gay men and transgender women as part of "chemsex", although its use in general has declined over time and is rare. [7] [4] [3] [17] 5-MeO-DiPT became a controlled substance in the United States in 2003. [3] [18] [19] The closely related drug 5-MeO-MiPT (moxy) has similar effects as 5-MeO-DiPT, remains legal in the United States and many other countries, and is often used as a substitute for 5-MeO-DiPT. [7] [1] [20] [21] [22]
In his book TiHKAL (Tryptamines I Have Known and Loved) and other publications, Alexander Shulgin reported the dose of 5-MeO-DiPT to be 6 to 12 mg orally, its onset to be 20 to 30 minutes or within 1 hour, its time to peak effects to be 1 to 1.5 hours, and its duration to be 4 to 8 hours. [1] [2] [23] [24] [8] [4] However, in other publications besides TiHKAL he gave a dose range of 6 to 10 mg [2] [8] or a dose range of 8 to 12 mg. [23] [24] [8] According to Shulgin, testing of 5-MeO-DiPT started at a dose of 0.1 mg and gradually titrated up in 10 human volunteers, with threshold effects occurring at a dose of 4 mg orally and full effects occurring at doses of 6 mg or more. [2] [8] The drug's has been described as "fast-acting" and its duration has also been reported to be "short-lived" and as brief as 3 to 6 hours. [1] [2] [7] [8] [4] In addition to oral administration, 5-MeO-DiPT has been reported to be used less commonly by smoking, insufflation, or intravenous injection. [4] [3] [5] Forms known to be used include powder, tablets, and capsules. [4]
The psychedelic or perceptual effects of 5-MeO-DiPT have been reported to include colors on edges of eyesight, color contrasts and sparkle, altered facial perception, sensory distortion, few if any visual enhancements, some closed-eye imagery but only at high doses, feelings of strangeness, objects having special significance, some musical sound distortions reminiscent of those of DiPT, music sounding strange and fake, time dilation, having only mild hallucinogenic effects, outgoing rather than inwardly reflective intellectual activation, lack of intuitive leaps, and a wave-like experience wherein the effects "waved in and out". [1] [2] [7] [4] [8] Affective and behavioral effects have included stimulation, some entactogen-like effects, talkativeness, disinhibition, emotional enhancement, opening of affect, easy emotional expression, easy communication with others, reduced guards and reservations, relaxation, feeling happy, mild euphoria, and mellowness. [1] [2] [7] [4] [8] In addition, the drug has been reported to produce tactile or sensual enhancement, one's body feeling alive and alert, feeling like waves are passing back and forth over one's body, awareness of vibrations, feeling sexually aroused, and "dramatic" erotic or sexual enhancement. [1] [2] [7] [4] [8]
Negative emotional and behavioral effects have included uncomfortableness, agitation, feeling unnerved, paranoia, and social avoidance, but no hangover. [1] [2] [8] 5-MeO-DiPT has been described as having minimal physical side effects and as being relatively free of autonomic side effects and indicators of toxicity. [1] [2] Reported physical side effects have included body load and discomfort, slight pupil dilation, mild nausea, some muscular hyperreflexia, muscle contractions and spasms, gastrointestinal disturbances, hypertension, and little change in appetite or sleep disruption. [1] [2] [8] The effects of 5-MeO-DiPT have been described as either being "positive" or a "mixed bag". [1] [2] User responses are said to vary dramatically, with some people finding it appealing, sexual, invigorating, interesting, and enjoyable, and others finding it nauseating, annoying, diarrhea-inducing, and generally unpleasant. [4]
5-MeO-DiPT has been described as LSD-like in some ways but as being quite different from other psychedelics. [1] [2] [7] Descriptions have included the drug never being psychedelic in the way of classical psychedelics like LSD and psilocybin, there being an absence of intense sensory disturbances or hallucinogenic effects as with other psychedelics like dimethyltryptamine (DMT) and psilocybin, never feeling as though one was having a psychedelic experience, and being able to function normally on a social level including at public events even at high doses. [1] [2] [7] However, one user who took a high dose described reaching a "plus-three" on the Shulgin Rating Scale in a very LSD-like manner but without the visuals. [1] Higher doses may produce more psychedelic effects, but the drug is still described as not that psychedelic even at such doses. [7] Despite its lack of robust hallucinogenic effects at typical doses, 5-MeO-DiPT is described as nonetheless producing quite profound emotional and intellectual modifications. [2]
5-MeO-DiPT is reported to differ in its subjective effects from the structurally related DiPT in most respects but to share some auditory effects with this drug. [2] [1] In terms of these effects, whereas DiPT caused harmonic distortion of heard sounds, 5-MeO-DiPT caused changes in musical character and interpretation without apparent changes in harmonic structure. [1] As such, while both produced auditory effects, DiPT and 5-MeO-DiPT caused different distortions of musical interpretation. [1] 5-MeO-DiPT has been described as a "psychedelic stimulant" and has a reputation as a "sexual enhancer" or "aphrodisiac". [7] [4] Among its effects, the pro-sexual effects of 5-MeO-DiPT have been especially highlighted, with these effects being present at low doses. [1] Users have remarked that it took them to a "marvelous sexy place", that "everything [was] shaded with eroticism", that the "erotic world was fantastic, explosive, almost scary", and that the drug may vie with 2C-B as a sexual enhancer or that it left 2C-B "in the dust" in this regard. [1] [7]
5-MeO-DiPT has been described as having effects similar to those of 5-MeO-MiPT and these drugs as having unique and distinct effects from those of other psychedelic tryptamines. [7] [22] They are reported to be very pro-sexual, much more stimulant, and more like party drugs than other tryptamines. [7] [3] [22] While 5-MeO-DiPT and 5-MeO-MiPT are described as pro-sexual, they may not be innately aphrodisiac but instead may produce tactile enhancement in a way that lends itself to sex. [7] The tactile enhancement and "body high" with 5-MeO-DiPT and 5-MeO-MiPT may in part be why they have been compared to entactogens like MDMA. [7] 5-MeO-DiPT has been described as being closer to MDMA in its effects than to psychedelic tryptamines and that the effects are a "body high kind of thing". [7] The drug is also known to be combined with other drugs such as MDMA. [25]
Flashbacks have been reported with 5-MeO-DiPT. [26] [27] There is a report of a prolonged delusional state associated with 5-MeO-DiPT. [28]
Excessive doses or overdose have caused clinical intoxication, characterized by nausea, vomiting, agitation, hypotension, mydriasis, tachycardia, and hallucinations, in a number of young adults. A number of these overdoses are attributed to the drug's delayed onset of action, where first time users, who were unfamiliar with the drug, administered a second dose after initially feeling no effects. Rhabdomyolysis and renal failure occurred in one young man and another one died 3 to 4 hours after an apparent rectal overdose. [29] There have been a number of published cases of severe and/or fatal intoxication with 5-MeO-DiPT. [3] [12] [13] [8] [30] [31] [32] [33] [34]
The effects of 5-MeO-DiPT may be potentiated when used in combination with cannabis. [8] [1]
| Target | Affinity (Ki, nM) |
|---|---|
| 5-HT1A | 16–170 (Ki) 56–>10,000 (EC50 ) 44–94% (Emax ) |
| 5-HT1B | 5,137–>10,000 (Ki) 85–170 (EC50) 100–134% (Emax) |
| 5-HT1D | 293–1,718 (Ki) 41–126 (EC50) 92–104% (Emax) |
| 5-HT1E | >10,000 (Ki) 407–2,190 (EC50) 67–86% (Emax) |
| 5-HT1F | ND (Ki) 871–3,240 (EC50) 53–83% (Emax) |
| 5-HT2A | 162–>10,000 (Ki) 6.2–946 (EC50) 99–124% (Emax) |
| 5-HT2B | 35–163 (Ki) 20–56 (EC50) 80–110% (Emax) |
| 5-HT2C | 1,740–>10,000 (Ki) 30–393 (EC50) 71–100% (Emax) |
| 5-HT3 | >10,000 |
| 5-HT4 | ND |
| 5-HT5A | >10,000 (Ki) >10,000 (EC50) ND (Emax) |
| 5-HT6 | 2,190–>10,000 (Ki) 324 (EC50) 87% (Emax) |
| 5-HT7 | 1,231–>10,000 (Ki) >10,000 (EC50) ND (Emax) |
| α1A, α1B | >10,000 |
| α1D | ND |
| α2A | >10,000 |
| α2B | 5,293–>10,000 |
| α2C | 2,865–3,081 |
| β1, β2 | >10,000 |
| β3 | ND |
| D1–D5 | >10,000 |
| H1–H4 | >10,000 |
| M1–M5 | >10,000 |
| I1 | 760 |
| σ1 | 9,443–>10,000 |
| σ2 | 291–3,002 |
| TAAR1 | ND |
| SERT | 874–>10,000 (Ki) 239–24,215 (IC50 ) >100,000 (EC50) (rat) |
| NET | >10,000 (Ki) 8,200–>10,000 (IC50) >100,000 (EC50) (rat) |
| DAT | >10,000 (Ki) 65,000 (IC50) >100,000 (EC50) (rat) |
| Notes: The smaller the value, the more avidly the drug interacts with the site. All proteins are human unless otherwise specified. Refs: [35] [36] [9] [10] [37] [38] [11] [39] [12] [13] [40] | |
5-MeO-DiPT acts as a non-selective serotonin receptor agonist, including of the serotonin 5-HT1A, 5-HT1B, 5-HT1D, 5-HT2A, 5-HT2B, and 5-HT2C receptors, among others. [36] [9] [10] [11] [12] [13] It has shown variably strong preference for the serotonin 5-HT1A receptor in terms of binding affinity, with 2-fold, 25-fold, >76-fold, and 161-fold higher for this receptor over the serotonin 5-HT2A receptor in different studies. [36] [9] [13] [37] [38] [26] [3] However, in terms of receptor activation, 5-MeO-DiPT showed similar potency at the serotonin 5-HT1A receptor and the serotonin 5-HT2A receptor and had several-fold preference for these receptors over the serotonin 5-HT2C receptor. [12]
In addition to its direct serotonin receptor interactions, 5-MeO-DiPT is a serotonin reuptake inhibitor with potency ranging from similar to its serotonin 5-HT2A receptor agonism to very low in different studies. [12] [41] [42] [13] Conversely, it does not significantly affect dopamine or norepinephrine reuptake and shows no activity as a monoamine releasing agent. [11] [13] [43] [39] [42] The drug can block the serotonin release induced by methamphetamine in vitro . [43] [42] 5-MeO-DiPT can elevate brain serotonin levels in rodents, presumably via its serotonin reuptake inhibition. [25] [44] The elevations in serotonin levels caused by 5-MeO-DiPT may be limited by its concomitant serotonin 5-HT1A receptor agonism, as serotonin 5-HT1A receptors serve as inhibitory autoreceptors that limit serotonin release. [41] By an unknown mechanism, but possibly serotonin 5-HT2A receptor agonism, 5-MeO-DiPT may also elevate brain dopamine levels in rodents, including in the prefrontal cortex, striatum, and/or nucleus accumbens, although findings are mixed. [25] [41] [44] The mechanism of action of the psychedelic effects of 5-MeO-DiPT is thought to be serotonin 5-HT2A receptor agonism, but its full mechanism of action is unclear and additional mechanisms may also be involved. [43] [37] [39]
5-MeO-DiPT produces the head-twitch response, a behavioral proxy of psychedelic-like effects, in rodents. [45] [26] [3] [46] [13] [47] [37] As with many other psychedelics, this follows an inverted U-shaped dose–response curve. [46] [37] The head-twitch response induced by 5-MeO-DiPT is blocked by serotonin 5-HT2A receptor antagonists such as volinanserin. [46] [37] 5-MeO-DiPT's head-twitch response is described as robust but also weak and much lower in magnitude than that produced by other serotonergic psychedelics such as 5-MeO-DMT or DOM. [38] [37] [13] The serotonin 5-HT1A receptor agonism of 5-MeO-DiPT may inhibit its serotonin 5-HT2A receptor-mediated head-twitch response. [37] 5-MeO-DiPT partially substitutes for LSD in rodent drug discrimination tests, with 52% responding at 1 mg/kg, 75% responding at 3 mg/kg, and behavioral disruption at higher doses. [37] In addition, it substitutes for DOM in rodent drug discrimination tests. [37] [48] The stimulus properties of 5-MeO-DiPT in LSD substitution tests are completely and insurmountably blocked by the serotonin 5-HT2A receptor antagonist volinanserin. [38] [37] Conversely, they are partially and surmountably blocked by the serotonin 5-HT1A receptor antagonist WAY-100635. [38] [37] Besides psychedelic-like effects, 5-MeO-DiPT also produces hypolocomotion and hypothermia in rodents and potentiates the forepaw treading induced by the serotonin 5-HT1A receptor agonist 8-OH-DPAT. [13] [47] [49] [25]
5-MeO-DiPT has been reported to produce neurotoxicity in rodents. [50] [43] [25] [51] [3] Administration of 5-MeO-DiPT to adolescent rodents produced marked decreases in spatial navigation performance in adulthood that were suggestive of deficits in cognitive flexibility, attention, and/or perseveration as well as other cognitive deficits. [3] [52] [14] [53] This was associated with serotonergic neurotoxicity and substantial 26 to 49% reductions in cortical and hippocampal serotonin levels that were analogous to those occurring with MDMA. [3] [14] However, the neurotoxic effects of 5-MeO-DiPT are described as less severe than and distinct from those of MDMA. [14] [15] The drug has also been reported to produce cytotoxicity as well as neurotoxic effects on serotonergic neurons ex vivo . [43] [51] The mechanisms underlying the serotonergic neurotoxicity of 5-MeO-DiPT are unknown. [43] [14] The drug might also produce prolonged dopaminergic adaptations or dopaminergic neurotoxicity in rodents as evidenced by long-lasting decreases in dopamine levels. [25] [51] In addition, it has been associated with marked genotoxicity or oxidative DNA damage, which has also been seen with MDMA and methamphetamine. [25] [51] It is said to be the first known tryptamine to be associated with such toxicity. [25]
The pharmacokinetics and metabolism of 5-MeO-DiPT have been studied. [54] [3] [55] [56] [57]
The chemical synthesis of 5-MeO-DiPT has been described. [1]
Analogues of 5-MeO-DiPT include diisopropyltryptamine (DiPT), 4-HO-DiPT (iprocin), 4-AcO-DiPT (ipracetin), 4-MeO-DiPT, 5-HO-DiPT, 5-MeO-DMT, 5-MeO-DET, 5-MeO-DPT, 5-MeO-DALT, 5-MeO-MiPT, 5-MeO-EiPT, 5-MeO-PiPT, 5-MeO-iPALT (ASR-3001), and 5-MeO-DiBF, among others. [1]
4-MeO-DiPT, 6-MeO-DiPT, and 7-MeO-DiPT are known positional isomers of 5-MeO-DiPT. [1] [24] 6-MeO-DiPT and 7-MeO-DiPT have been described by Alexander Shulgin as being inactive at doses of up to 50 mg and 70 mg orally, respectively, whereas 4-MeO-DiPT was not assessed. [1] [24]
5-MeO-DiPT was discovered in the 1970s and was first described by Alexander Shulgin and Michael Carter in 1980. [7] [16] [1] [2] Shulgin tested it and discovered its effects starting in 1975. [58] [59] The drug started to be encountered as a novel recreational and designer drug in 1999. [3] [4] 5-MeO-DiPT became a temporarily controlled substance in the United States in 2003 and a permanently controlled substance in 2004. [3] [18] [19] The recreational use of 5-MeO-DiPT appears to have declined over time and its use is described as being not very prevalent. [4] [7] [3]
Use of 5-MeO-DiPT has been found to be particularly prevalent among gay men who use drugs as part of chemsex. [3] [60] [61] It is also seen in transgender women. [17] [62] The drug is described as a stimulant, sexual enhancer, party drug, and light psychedelic. [7] 5-MeO-DiPT has been associated with increased risk of HIV diagnosis in multiple studies in Asia, perhaps due to risky sexual behavior involving the drug. [7] [61] [63] [17]
As of October 2015, 5-MeO-DiPT is a controlled substance in China. [65]
Illegal since February 2004.[ citation needed ]
Illegal since September 1999.[ citation needed ]
Illegal since February 2003.[ citation needed ]
Illegal since April 2005. [3]
Illegal since early 2006.[ citation needed ]
Sveriges riksdags health ministry Statens folkhälsoinstitut classified 5-MeO-DiPT as "health hazard" under the act Lagen om förbud mot vissa hälsofarliga varor (translated Act on the Prohibition of Certain Goods Dangerous to Health) as of Oct 1, 2004, in their regulation SFS 2004:696 listed as 5-metoxi-N,N-diisopropyltryptamin (5-MeO-DIPT), making it illegal to sell or possess. [66]
On April 4, 2003, the United States DEA added both 5-MeO-DiPT and α-methyltryptamine (AMT) to Schedule I of the Controlled Substances Act under "emergency scheduling" procedures. [3] The drugs were officially placed into Schedule I on September 29, 2004. [3] Prior to its prohibition in the U.S., 5-MeO-DiPT was sold online alongside psychoactive analogues such as diisopropyltryptamine (DiPT), and dipropyltryptamine (DPT), neither of which have yet been expressly outlawed.
Other 5-MeO compounds 5-MeO compounds were less prevalent in this sample of experienced tryptamine users. We received few comments about the effects of individual compounds in this subclass, and these compounds tended to be described as being more sexual than other compounds. One participant also pointed out that 5-Meo-DIPT ("Foxy Methoxy" or "Foxy") gained notoriety in the United States as a sexual enhancement drug. 5-Meo-DIPT, Foxy, or Moxy (5-Meo-MIPT) are tryptamines that are distinct. A lot of people I know that like them think they're very aphrodisiac and much more stimulant and a party drug. My opinion on 5-MeO-MIPT is that it was a very sexual chemical … it feels good to touch things, and that sort of sensation certainly lends itself to sex but I wouldn't call it innately an aphrodisiac. These increased sensations of touch are likely why some users compared the "body high" with the high associated with MDMA use. The effects of 5-MeO compounds were also described as being shorter lasting than other tryptamines. I would actually say that it is closer to MDMA in its effects. The whole series of 5-MeO and 4-MeO … they're both very closely related in their effects so it tends to be a body high kind of thing. At higher doses it can get more psychedelic, but it's not that psychedelic. [...] first discovered or first synthesized as early as [...] in the 1970s (e.g., 4-HO-MET and 5-MeO-DIPT). However, use does not appear to be very prevalent (Palamar & Le, 2019; Palamar, Martins, Su, & Ompad, 2015), and most of these compounds do not have much of a presence in the published literature. [...] Finally, 5-MeO-DIPT ("Foxy") was also used by a few of our participants, and they noted sexual effects of the drug. Although sometimes described as a sex drug on the internet, academic literature does not seem to describe sexual effects of the drug. However, multiple studies in Asia have linked use of 5-MeO-DIPT to increased risk for HIV diagnosis, likely due to risky sexual behavior involving the drug (Hayashi, Wakabayashi, Ikushima, & Tarui, 2017; Kuwahara et al., 2008; Shan et al., 2018).
Foxy is slang for 5-methoxy-N,N-diisopropyltryptamine. It has hallucinogenic properties, similar to other tryptamine compounds, and is mildly euphoric. [...] This case report describes a 21-year-old Caucasian man who ingested a pill called Foxy containing an unknown amount of drug. He was observed in hospital for 2 h, during which time he had mild hallucinations and could not move his limbs. [...] Clinically, the drug promotes emotional expression, a talkative uninhibited state (7), and visual and auditory sensory distortions (8). No other clinical studies appear in the medical literature. There are no reported pharmacological studies in humans. Some of the drug's physiological properties are also common to the recreational drug methylenedioxymethamphetamine (Ecstasy). Not surprisingly, 5-MeO-DIPT is a club drug (2) and has been substituted for Ecstasy on the street (3). [...] In 1980, Shulgin and Carter (7) described the administration of 5-MeO-DIPT to 10 human subjects. Each person received a 0.1mg oral dose which was then increased in increments of 30 to 50% in subsequent drug administrations. Threshold subjective effects were observed with a 4-mg dose. Effective doses were between 6 and 10 mg. The peak drug effect occurred at 1 to 1.5 h after ingestion, and recovery was observed after 3 h with no residual symptoms at 6 h. Subjects reported a relaxed feeling associated with emotional enhancement. They were frequently talkative and felt their conversations to be expressive and stimulating. Shulgin and Shulgin (8) later summarized the responses from an additional 10 human subjects upon administration of 6 to 12 mg of 5-MeO-DIPT. Most subjects reported auditory and visual distortions. Two indicated aphrodisiac tendencies; one experienced gastrointestinal emptying, muscle spasms, and agitation; and one indicated a synergistic effect with marijuana. [...] In our patient, the drug lasted 3.5 h. He said he felt "weird" (apprehensive) and saw symbols (visual hallucination) as opposed to being talkative or expressive of his emotions.
5-MeO-DiPT (5-Methoxy-N,N-diisopropyltryptamine): substituted tryptamine, first synthesized and tested by Shulgin and Carter (1979).
Ikeda et al. (2005) reported flashbacks after use of 5-methoxy-N,N-diisopropyltryptamine (5-MeO-DIPT) by a 35-year-old man without a previous psychiatric history. He had used the substance six or seven times over 5 months but discontinued it after he had a bad trip, with anxiety, palpitations, auditory oversensitiveness, and visual distortions. Treatment with oral risperidone ameliorated his symptoms. [...] Fantegrossi et al. (2006) demonstrated that 5-MeODIPT induced the head twitch in mice, and the effect was antagonized by pretreatment with the 5-HT2A– selective antagonist M100907. The affinity of 5-MeO-DIPT was measured at rat 5-HT1A, 5-HT2A, and 5-HT2C receptors using antagonist radioligands, with Ki values determined to be 35 nM, 5620 nM, and 1700 nM, respectively. Thus, despite the higher affinity for 5-MeO-DIPT at the 5-HT1A receptor, the head twitch was mediated through the 5-HT2A receptor.
Likewise, the HTR is induced by ring-substituted tryptamines, including psilocin, psilocybin, 5-MeO-DMT, and 5-MeO-DIPT (Corne and Pickering 1967; Bedard and Pycock 1977; Fantegrossi et al. 2006; González-Maeso et al. 2007; Halberstadt et al. 2011).
{{cite book}}: |journal= ignored (help)Certain indolealkylamines, including DMT, N,N-dipropyltryptamine (DPT), 5-MeO-DMT, and 5-methoxy-N,Ndiisopropyltryptamine (5-MeO-DIPT) block 5-HT uptake at micromolar concentrations (Nagai et al., 2007; Sogawa et al., 2007; Cozzi et al., 2009) and serve as substrates for the 5-HT transporter (Cozzi et al., 2009). [...] Likewise, HTR induced by DPT, 5-MeO-DIPT, and TCB-2 in mice is blocked by M100,907 and MDL 11,939 (Fantegrossi et al., 2006, 2008; Fox et al., 2009). [...] Fantegrossi and colleagues have reported that the HTR induced by DOI, 2C-T-7, DPT, and 5-MeO-DIPT in NIH Swiss and Swiss-Webster mice typically follows an inverted U-shaped dose–response function (Fantegrossi et al., 2005, 2006, 2008, 2010).