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SKF-38393 is a synthetic organic compound of the benzazepine class that acts as a selective agonist at the dopamine D1 receptor family. It is not a medicine but a research chemical, used in laboratory and animal studies to probe the functions of D1-type dopamine receptors. Because it stimulates these receptors relatively selectively, it has served as a standard tool for investigating dopamine signaling in the brain.
- Selective D1 receptor activation for research
- Tool for studying dopamine circuits
- Used in memory and movement studies
- Not evaluated for human use
Overview
SKF-38393 is a member of the 1-phenyl-3-benzazepine family of compounds and is classified pharmacologically as a selective agonist of the D1-like dopamine receptors, which comprise the D1 and D5 subtypes [1]. It behaves as a partial agonist, meaning it activates these receptors but produces a submaximal response compared with a full agonist [2]. The molecule carries two hydroxyl groups on its ring system, a catechol-like feature shared with dopamine itself [1].
The compound was developed as part of medicinal chemistry work on benzazepines and has been used since the 1980s primarily as an experimental probe rather than as a therapeutic drug. Radiolabeled versions of SKF-38393 were used to map where D1 receptors sit in the brain and spinal cord, revealing high densities in regions such as the striatum, nucleus accumbens, and substantia nigra [1]. Structurally related compounds derived from it, such as the chlorinated analogue SKF-81297, have been developed as more potent D1 agonists for research [1].
In animal studies SKF-38393 has been used to reveal the behavioral roles of D1 receptor activation. It promotes grooming and arousal and suppresses rapid eye movement sleep, supporting the idea that D1 receptors help drive wakefulness [2]. It also reduces food intake in rats, an anorectic effect that helped define the involvement of D1 receptors in the control of feeding [3]. Findings such as these have made the compound a reference agonist for separating D1-mediated from D2-mediated dopamine effects.
SKF-38393 has never been approved as a medicine and is not used clinically. It exists as a laboratory reagent, carries no therapeutic marketing, and is handled as a research chemical for use in scientific studies.
Mechanism
SKF-38393 produces its effects by binding to and activating -like receptors, the class that couples to stimulatory G proteins and raises levels of the intracellular messenger cyclic AMP. Acting as a partial , it switches these receptors on but to a lesser degree than the natural transmitter dopamine [2]. Binding studies with radiolabeled SKF-38393 showed that its targets are concentrated in -rich areas of the brain, distinct in places from the sites of receptors, which confirmed its selectivity for the family [1]. By selectively engaging receptors, it sets off downstream changes in neuronal activity that appear behaviorally as effects on movement, arousal, sleep, and feeding [2][3].
receptor fingerprint
receptorpartial agonist
D5 receptorpartial agonist
Adenylyl cyclase / increases
Striatal motor circuitsmodulates
Dosingtypical ranges, not medical advice
interested in protocols and clinical dosages? make an account to see them! ^_^
Safetyrisks and cautions, not medical advice
There is essentially no established human safety data. In animals, strong D1 activation can affect movement, cardiovascular parameters, and behavior. Because it is an unapproved research chemical with unknown human pharmacokinetics and purity concerns, it should be regarded as not for human use.
Subjective profileweighing the evidence above
A dopamine D1 research probe with no human safety data; interesting for pharmacology nerds, not for actual use.
Resources
This entry is here for reference.
Research
- 1986first citedAutoradiographic distribution of the D1 agonist [3H]SKF 38393, in the rat brain and spinal cord…
- 1993most recentThe dopamine D1 receptor agonists, A68930 and SKF 38393, induce arousal and suppress REM sleep…
- 1.Autoradiographic distribution of the D1 agonist [3H]SKF 38393, in the rat brain and spinal cord. Comparison with the distribution of D2 dopamine receptors.
- 2.The dopamine D1 receptor agonists, A68930 and SKF 38393, induce arousal and suppress REM sleep in the rat.
- 3.The anorectic effect of SK&F 38393, a selective dopamine D1 receptor agonist: a microstructural analysis of feeding and related behaviour.
3 listed here; entry last updated August 2026
Reviews
My notesprivate to this device
FAQ
Is SKF-38393 a nootropic?
Only in the sense that it manipulates dopamine D1 signaling in research; it has no established human nootropic use.
Can I take it for focus?
No, there's no human safety or dosing data; it's a laboratory research chemical.
What does it actually do?
It selectively activates dopamine D1-like receptors, which scientists use to study motivation, movement, and memory in animals.
Is it legal or approved?
It is not an approved drug or supplement anywhere; it exists as a research reagent.
Adverse effects
- Not evaluated for human use
Notes and cautions
- Increased grooming in animal studies
- Reduced REM sleep in animal studies
- Reduced food intake in animal studies
- Cardiovascular effects reported in animals