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Product Name: JWH-073
IUPAC Name: naphthalen-1-yl-(1-butylindol-3-yl)methanone
Other Names: JWH-073, Spice
Molecular Formula: None
Molar Mass: 237.26 g·mol−1
Effect: stimulant, psychedelic
Purity of the substance: 99.9%
Physical properties: Crystals, Powder
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Table of Contents

  1. Introduction
  2. Chemistry and Pharmacology
  3. Physical Effects
  4. Cognitive Effects
  5. Combinational Effects
  6. Experience Reports
  7. Toxicity and Harm Potential
  8. Tolerance and Addiction Potential
  9. Dangerous Interactions
  10. Legal Status

Introduction to JWH-073

JWH-073 belongs to the naphthoylindole family and serves as an analgesic chemical. It acts as a partial agonist at both the CB1 and CB2 cannabinoid receptors. Developed by researchers, its name "JWH" stems from John W. Huffman, one of its inventors.

Pharmacological Profile

JWH-073 exhibits partial selectivity for the CB1 subtype, showing approximately five times more affinity for CB1 receptors compared to CB2 receptors.

Emergence and Popularity

JWH-073 garnered attention in April 2009 when chemists from the University of Freiburg reported its presence in a product labeled "Forest Humus," alongside another synthetic cannabinoid, CP 47,497. Subsequently, it was identified in Spice, a widely distributed synthetic cannabis blend sold globally since 2002.

Administration and Effects

Typically smoked or vaporized for rapid onset of effects, JWH-073 can also be orally active when dissolved in lipids, extending its duration of action. Like other cannabinoids, it lacks solubility in water but dissolves in ethanol and lipids.

Safety Considerations

In contrast to natural cannabis, chronic abuse of synthetic cannabinoids like JWH-073 has been linked to severe adverse effects, including fatalities. The substance exhibits increased toxicity, emphasizing the importance of avoiding prolonged usage or excessive doses.

In conclusion, while JWH-073 offers insights into cannabinoid pharmacology, its potential risks underscore the need for cautious and informed use, recognizing the dangers associated with synthetic cannabinoids.

Understanding JWH-073: Chemistry and Pharmacology

Chemical Structure

JWH-073, formally known as Naphthalen-1-yl-(1-butylindol-3-yl)methanone, is a synthetic cannabinoid characterized by a substituted indole structure. This structural motif is shared with various other cannabinoid compounds, such as PB-22, 5F-PB-22, JWH-018, and AM2201. In the case of JWH-018, there is a butyl chain substitution at R1, while at R3, the indole core bears a carbonyl group bonded to a napthalene moiety. Napthalene itself comprises two fused benzene rings, and the carbonyl bridge classifies JWH-073 as a ketone. Notably, JWH-073 is an analog of THJ-073, where the indazole structure is replaced by an indole base.

Pharmacological Properties

JWH-073 distinguishes itself from most synthetic cannabinoids, including JWH-018, as it acts as a partial agonist of both the CB1 and CB2 cannabinoid receptors. However, its interactions with humans remain inadequately researched compared to JWH-018. Nonetheless, animal studies indicate a higher binding profile for JWH-073 than THC, the primary psychoactive component of natural cannabis.

Subjective Effects

Disclaimer: The following effects are based on anecdotal user reports and the Subjective Effect Index (SEI), reflecting personal analyses of PsychonautWiki contributors. While informative, these effects may not manifest predictably or reliably. Higher doses increase the likelihood of experiencing the full spectrum of effects, with adverse effects becoming more probable, including addiction, severe injury, or death.

Understanding JWH-073: Dosage Guidelines


The threshold dose for JWH-073 is reported to be less than 3 mg. At this dosage, individuals may begin to perceive subtle effects associated with the compound.


A light dose of JWH-073 ranges between 3 to 5 mg. At this level, users may experience mild to moderate effects, typically characterized by a subtle alteration in perception or mood.


A common dose falls within the range of 5 to 10 mg of JWH-073. Users at this dosage level can anticipate more pronounced effects, potentially leading to alterations in cognition and sensory perception.


A strong dose of JWH-073 ranges between 10 to 15 mg. At this level, individuals may experience intense and profound effects, including significant changes in perception, mood, and cognition.


Doses exceeding 15 mg of JWH-073 are considered heavy. Users should approach this dosage range with extreme caution due to the heightened risk of experiencing overwhelming and potentially adverse effects, including but not limited to intense hallucinations, paranoia, and physical discomfort.

Understanding JWH-073: Physical Effects

Spontaneous Tactile Sensations

The "body high" induced by JWH-073 is characterized by warm, soft, and pleasurable tactile sensations that spread across the body prior to ingestion. This sensation intensifies rapidly upon onset, reaching its peak before dissipating. Compared to JWH-018, the tactile effects of JWH-073 are described as less intense relative to cognitive effects.


JWH-073 typically exerts sedative effects on energy levels, promoting relaxation and, at higher doses, inducing sleepiness. While its sedative effects are moderate, they are reportedly less powerful compared to compounds like JWH-018, 5F-AKB48, and 5F-PB-22. However, JWH-073 may produce more sedation than THC, THJ-018, AM-2201, or 5F-UR-144.

Motor Control Loss

Users of JWH-073 may experience partial to moderate suppression of motor control, which escalates with dosage. However, it rarely results in a complete inability to walk or perform basic movements.

Appetite Enhancement

Similar to other cannabinoids, JWH-073 can increase appetite, colloquially known as "the munchies." Clinical studies have shown that cannabinoids, including synthetic ones, enhance food enjoyment and interest, possibly by activating cannabinoid receptors responsible for regulating food intake in the hypothalamus.


A common side effect of JWH-073 use is dehydration, often referred to as "cotton mouth." This sensation of dryness in the mouth and throat is prevalent in American and British culture.


Cannabinoids like JWH-073 are known to decrease blood pressure by dilating blood vessels, leading to increased blood flow throughout the body. This may result in the expansion of arteries in the eyeball and an increase in heart rate to compensate for reduced blood pressure.

Pain Relief

JWH-073, along with other cannabinoids, has been clinically shown to provide pain relief by agonizing cannabinoid receptors CB1 and CB2. This analgesic effect extends to synthetic cannabinoid receptor agonists.

Perception of Bodily Heaviness or Lightness

Users may experience alterations in the perception of bodily weight, feeling either heavier or lighter than usual.

Changes in Gravity

JWH-073, similar to other cannabinoids, can induce vertigo, causing the environment to appear to spin or oscillate. At moderate doses, users may experience sensations of falling, which can be overwhelming but tend to diminish with tolerance.

Understanding JWH-073: Cognitive Effects

Emotion Enhancement

A prominent cognitive effect of cannabinoids like JWH-073 is their ability to enhance existing emotions in proportion to dosage. This can manifest as euphoria, extreme laughter, increased immersion in tasks, or heightened anxiety or paranoia, depending on the user's mindset at the time.


JWH-073 is noted for its significant euphoric effects compared to compounds like JWH-018, THJ-018, AM-2201, and 5F-UR-144.

Thought Connectivity

Users may experience enhanced thought connectivity, leading to more fluid and abstract thinking compared to linear thought patterns.


Subjectively, JWH-073 is considered less anxiogenic and stimulating than Δ9-THC, JWH-018, THJ-018, AM-2201, or 5F-UR-144.

Conceptual Thinking

JWH-073 may influence conceptual thinking, potentially leading to new insights or perspectives.

Dream Suppression

The use of JWH-073 may suppress dream recall during sleep.

Analysis Suppression

Users may experience suppression of analytical thinking while under the influence of JWH-073.


While all cannabinoids have the potential to induce paranoia, JWH-073 tends to produce less intense paranoia compared to Δ9-THC, JWH-018, 5F-AKB48, and 5F-UR-144, particularly at high doses or with chronic use.


Prolonged usage of synthetic cannabinoids like JWH-073 may increase the risk of psychosis, especially in vulnerable individuals with a history of psychotic illnesses such as schizophrenia.

Thought Deceleration

Users may experience a slowing down of thought processes while under the influence of JWH-073.

Visual Effects

Colour Enhancement

JWH-073 can enhance perception of colors, making them appear more vibrant and intense.

Visual Acuity Suppression

The substance may suppress visual acuity, leading to blurred vision or difficulty focusing.


At moderate doses, JWH-073 can induce closed-eye visuals and visual distortions such as ripples in the field of vision. In users who regularly use psychedelics, it may produce consistent visual distortions reminiscent of past psychedelic experiences, typically reaching up to level 4 intensity.

Auditory Effects


JWH-073 may enhance auditory perception, making sounds seem more vibrant or immersive to the user.

Understanding JWH-073: Combinational Effects


Combining cannabinoids with psychedelics can intensify and prolong both visual and cognitive effects. However, caution is advised, especially for inexperienced users of psychedelics.


When used alongside dissociatives, cannabinoids like JWH-073 can significantly enhance effects such as geometry, euphoria, dissociation, and hallucinations.


Combining JWH-073 with alcohol may lead to extreme nausea, dizziness, and changes in perception of gravity. It is recommended to use cannabinoids before alcohol and not the other way around, unless with extreme caution.

Experience Reports

Currently, there are no anecdotal reports describing the effects of JWH-073 within our experience index. Additional experience reports can be found on platforms like Erowid Experience Vaults: JWH-073.

Toxicity and Harm Potential

JWH-073, unlike many synthetic cannabinoids, acts as a partial agonist of CB1 receptors. As a result, harm mediated by CB1 receptor agonism may be less severe compared to full agonist counterparts. Prolonged use of synthetic cannabinoids may exacerbate pre-existing psychological disorders, leading to intense paranoia, anxiety, and agitation.

Tolerance and Addiction Potential

Chronic use of JWH-073 can lead to psychological dependence and addiction. Tolerance to its effects develops with prolonged use, requiring users to increase dosage to achieve the same effects. Cross-tolerance with all cannabinoids may occur, reducing the effectiveness of other cannabinoids.

Dangerous Interactions

Combining JWH-073 with certain substances, such as stimulants or psychedelics, can lead to dangerous interactions, including increased anxiety levels and risk of negative experiences.

Legal Status

JWH-073 is illegal or controlled in various countries, including Australia, Austria, Brazil, Germany, Lithuania, New Zealand, Sweden, Switzerland, the United Kingdom, and the United States. These countries have enacted legislation prohibiting its production, sale, and possession.

  • Australia: JWH-073 was banned for sale by the Australian government on July 8th, 2011, and is categorized as a Schedule 9 prohibited substance under the Poisons Standard.

  • Austria: Possession, production, and sale of JWH-073 are illegal under the Neue-Psychoaktive-Substanzen-Gesetz Österreich.

  • Brazil: JWH-073 is listed on Portaria SVS/MS nº 344, making its possession, production, and sale illegal.

  • Germany: Controlled under Anlage II BtMG (Narcotics Act, Schedule II) since January 22, 2010, it is illegal to manufacture, possess, import, export, buy, sell, procure, or dispense without a license.

  • Lithuania: Classified as a controlled substance since May 27, 2009.

  • New Zealand: The New Zealand government banned its sale on May 8th, 2014.

  • Sweden: Banned under the law 1992:1554, effective September 15, 2009.

  • Switzerland: Listed under Verzeichnis D, it became a controlled substance on December 1, 2010.

  • United Kingdom: Illegal to produce, supply, or import under the Psychoactive Substance Act since May 26, 2016.

  • United States: Initially declared a Schedule I controlled substance by the U.S. DEA on March 1, 2011, and permanently instated as such on July 9, 2012, through the Food and Drug Administration Safety and Innovation Act.

Understanding the legal status of JWH-073 is crucial for individuals to comply with local regulations and avoid legal consequences associated with its possession or distribution.

Frequently Asked Questions (FAQ)

1. What is JWH-073?

JWH-073 is a synthetic cannabinoid belonging to the naphthoylindole family, acting as a partial agonist at both CB1 and CB2 cannabinoid receptors.

2. What are the common physical effects of JWH-073?

Common physical effects include spontaneous tactile sensations, sedation, motor control loss, appetite enhancement, dehydration, vasodilation, and pain relief.

3. How does JWH-073 affect cognition?

JWH-073 can enhance emotions, induce euphoria, enhance thought connectivity, and may lead to anxiety or paranoia. It may also influence conceptual thinking and suppress dreaming and analytical thinking.

4. Can JWH-073 be combined with other substances?

Combining JWH-073 with psychedelics or dissociatives can intensify effects, while combining it with alcohol may lead to adverse reactions such as nausea and dizziness.

5. Is JWH-073 legal?

The legal status of JWH-073 varies by country. It is banned or controlled in several countries, including the United States, Australia, Germany, and the United Kingdom.

6. Is JWH-073 addictive?

Chronic use of JWH-073 can lead to psychological dependence and addiction, with users developing tolerance to its effects over time.

7. Are there any dangerous interactions associated with JWH-073?

Combining JWH-073 with certain substances, such as stimulants or psychedelics, can lead to dangerous interactions, including increased anxiety levels and risk of negative experiences.

8. What precautions should be taken when using JWH-073?

It is important to use proper precautions when dosing JWH-073 to avoid negative experiences. Harm reduction practices should be followed, and individuals should be aware of the legal status and potential risks associated with its use.

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