Cacti may appear to be simple and familiar plants, yet some species contain a substance capable of causing profound changes in consciousness and perception. One of the most notable of these substances is mescaline, a naturally occurring hallucinogenic compound found in certain types of cacti, most notably peyote.Mescaline affects the central nervous system, altering the way a person perceives colors, shapes, time, and reality. It may also cause noticeable changes in thinking, emotions, and behavior.Although mescaline has historically been associated with certain traditional and ceremonial practices, its use outside controlled medical or research settings may carry psychological and physical risks, including anxiety, panic, confusion, and hallucinations. In some individuals, it may also be associated with persistent perceptual or psychological complications.In this Dalili Medical article, we explore mescaline from several perspectives, beginning with its definition and natural sources, followed by how it affects the central nervous system and its short- and long-term effects. The article also discusses the risks associated with its use, mescaline use disorder, psychological and medical treatment approaches, and the role of family support in the recovery process.

1. What is mescaline?

Mescaline is a hallucinogenic substance that affects the central nervous system. It occurs naturally in certain types of cacti, most notably peyote and San Pedro cactus. Mescaline primarily affects the brain’s serotonin system, particularly 5-HT2A receptors, resulting in changes in perception, sensory processing, and thinking.

2. What are the effects of mescaline?

Mescaline can cause noticeable changes in perception, sensory experiences, thinking, and mood. It may alter the perception of colors and shapes, distort the sense of time and distance, and produce visual or sensory hallucinations. Some people may also experience severe anxiety, panic attacks, confusion, or a distorted sense of reality.

3. Is mescaline addictive?

Mescaline is not generally known to cause severe physical dependence. However, its use can lead to substance use disorder in some individuals. This may involve compulsive use, difficulty controlling or stopping use, and continued use despite experiencing negative consequences or problems.

4. Does mescaline cause withdrawal symptoms?

Mescaline is not generally known to cause a severe and distinctive physical withdrawal syndrome like some other substances. However, after stopping its use, some individuals may experience sleep disturbances, mood changes, or cravings to use the substance again, particularly when use has been frequent or problematic.

5. What are the harms of mescaline?

Mescaline may cause a range of adverse effects, including nausea and vomiting, increased heart rate and blood pressure, anxiety and panic, confusion, and impaired judgment and decision-making, which can increase the risk of accidents and injuries. In some cases, psychotic symptoms or persistent perceptual disturbances may occur after the effects of the substance have worn off.

6. Does mescaline affect the brain?

Yes. Mescaline directly affects the central nervous system and acts primarily on serotonin receptors in the brain, particularly 5-HT2A receptors. This can alter the activity of neural networks involved in perception, information processing, attention, and the sense of self, helping explain some of its hallucinogenic effects.

7. Does mescaline cause permanent brain damage?

There is currently no strong scientific evidence showing that mescaline inevitably causes permanent neurological damage in humans. However, research on its long-term effects remains limited, and some individuals may experience persistent psychological or perceptual complications after the effects of the substance have ended.

8. What is Hallucinogen Persisting Perception Disorder (HPPD)?

Hallucinogen Persisting Perception Disorder (HPPD) is a condition in which visual disturbances may persist after the effects of a hallucinogenic substance have ended. These disturbances may include halos, flashes of light, visual trails or afterimages, and changes in the perception of colors and shapes. HPPD is uncommon but can be distressing and may require medical evaluation when symptoms persist or interfere with daily life.

9. Can mescaline use disorder be treated?

Yes. Mescaline use disorder can be treated with an individualized treatment plan. There is no specific medication that directly treats dependence on mescaline. Treatment generally focuses on medical and psychological assessment, psychotherapy, and addressing any co-occurring mental health or behavioral conditions.

10. Are there medications for mescaline use disorder?

There is currently no approved medication specifically designed to treat mescaline use disorder. However, a physician may prescribe medications to manage certain symptoms or complications, such as severe agitation or psychotic symptoms, depending on the individual’s condition and under appropriate medical supervision.

11. What role does the family play in treating mescaline use disorder?

Family members can play an important role in supporting recovery by encouraging the individual to seek professional help, supporting adherence to treatment and follow-up appointments, and avoiding providing or facilitating access to the substance. A calm and supportive home environment can also be beneficial. It is important to treat the individual with respect and avoid violence, humiliation, or threats, as supportive family involvement may help sustain treatment and reduce the risk of relapse.

12. Is mescaline safe because it is a natural substance?

No. The fact that mescaline occurs naturally in certain plants does not mean that it is safe or free from risks. Mescaline is a psychoactive compound that can cause significant changes in perception and consciousness, along with psychological and physical effects that may vary in severity from one person to another.

13. What should I do if someone experiences severe hallucinations after taking mescaline?

The person should be kept in a calm and safe environment and should not be left alone. Do not give them any medication unless directed by a medical professional. If the person loses consciousness, experiences seizures, has difficulty breathing, becomes severely agitated, develops a very high body temperature, or poses a danger to themselves or others, emergency medical services should be contacted immediately.

14. Can a person return to normal life after stopping mescaline?

Yes. Many people can regain a stable and healthy daily life after stopping mescaline use, particularly when they receive appropriate treatment and support. Recovery varies from person to person and may depend on the duration and severity of use, the presence of co-occurring mental health or medical conditions, and adherence to the treatment plan.

15. Can mescaline be used to treat depression or anxiety?

Mescaline is not an approved medical treatment for depression or anxiety disorders. Although scientific research has investigated certain hallucinogens and their potential psychological effects, this does not mean that self-administering mescaline is a safe or evidence-based treatment. Depression and anxiety should be evaluated and treated under the supervision of an appropriately qualified healthcare professional.

What Does Mescaline Look Like?

When discussing pure mescaline as a chemical substance, its physical appearance can vary depending on its chemical form. It may appear as a crystalline solid, while some mescaline salts may occur as white or light-colored powders or crystals.

However, color and appearance alone cannot be used to identify mescaline reliably. Many different chemical substances can look similar, and products obtained from unknown or illicit sources may contain other compounds.

Physical and Psychological Symptoms of Mescaline Use Disorder

It is important to distinguish between effects that occur while a person is under the influence of mescaline and signs that may indicate a substance use disorder. Mescaline is not generally known to cause severe physical dependence; therefore, problematic use may be more closely associated with compulsive behavior, difficulty controlling use, and psychological consequences.

First: Psychological and Behavioral Symptoms

Possible signs may include:

• A recurring or intense desire to use mescaline.

• Difficulty stopping or reducing use despite repeated attempts.

• Preoccupation with obtaining the substance or planning its use.

• Continued use despite problems at work, school, or in social relationships.

• Using mescaline as a way to escape anxiety, psychological stress, or negative emotions.

• Repeated use despite previously experiencing frightening hallucinations or panic attacks.

• Mood changes, such as anxiety, irritability, or sleep disturbances.

• Hallucinations, paranoia, or disorganized thinking while under the influence.

• The emergence or worsening of psychotic symptoms in individuals who are predisposed to them.

Second: Physical Symptoms

Mescaline does not typically cause a severe, characteristic physical withdrawal syndrome like that associated with some other substances, such as alcohol or opioids. Nevertheless, its use may be associated with several physical effects, including:

• Increased heart rate and blood pressure during intoxication.

• Sweating and dilated pupils.

• Nausea and vomiting.

• Dizziness and tremors.

• Sleep disturbances and fatigue.

• Impaired motor coordination, which may increase the risk of accidents and injuries.

• Persistent or recurrent visual disturbances in some individuals, such as halos, flashes, or visual trails. These symptoms may be associated with Hallucinogen Persisting Perception Disorder (HPPD).

Goals of Family Support

The main goals of family involvement may include:

• Encouraging the individual to acknowledge the problem and seek professional help.

• Providing psychological and social support throughout treatment.

• Helping the individual attend appointments and follow the treatment plan.

• Reducing situations and factors that may trigger a return to substance use.

• Recognizing warning signs and seeking appropriate help when necessary.

• Supporting improvements in daily habits and mental well-being.

• Helping the individual rebuild healthy relationships and establish a more stable daily routine.

• Providing family members themselves with education and support on how to respond appropriately to the problem.

Family Roles in Supporting Treatment

1. Responding Calmly and Without Stigma

Family members should treat the individual with respect and understanding, listen to their concerns, and discuss the risks associated with substance use without insults, threats, or violence. This approach can help maintain trust and encourage the individual to seek treatment.

2. Encouraging Professional Assessment

The family can encourage the individual to consult a psychiatrist or a specialist in substance use disorders to assess the pattern of use, mental health status, and overall needs, and to develop an appropriate treatment plan.

3. Supporting Treatment Adherence

Family members can provide practical support with medical appointments and psychotherapy sessions and encourage adherence to the treatment plan while respecting the individual's privacy and autonomy.

4. Reducing Triggers

The family can help the individual avoid people, places, or situations associated with substance use while avoiding turning the home into an environment of constant surveillance or control.

5. Not Providing or Financing the Substance

The desire to help should not lead family members to provide money to purchase mescaline or facilitate access to it. Family support should promote recovery rather than enable continued substance use.

6. Monitoring Warning Signs

Family members should be aware of signs that require urgent medical attention, including persistent hallucinations, psychosis, severe confusion, dangerous behavior, or thoughts of harming oneself or others.

7. Responding to a Person Experiencing Hallucinations

If a person is under the influence of mescaline and experiencing severe confusion or hallucinations, it is preferable to provide a calm and safe environment, remove objects that could cause injury, and avoid arguing with the person about what they are seeing or experiencing. If the person becomes a danger to themselves or others, or develops severe symptoms, urgent medical assistance should be sought.

8. Supporting Healthy Daily Habits

Family members can encourage the individual to maintain a more structured lifestyle, including adequate sleep, proper nutrition, regular physical activity, and avoidance of alcohol and other substances that may worsen problems or interfere with recovery.

9. Supporting the Family Itself

Dealing with a substance use disorder can be emotionally challenging for family members. Therefore, they may also benefit from education, support, or professional counseling when needed. Maintaining the family's own psychological well-being can help them provide more stable and effective support to the person receiving treatment.

Barriers to Family Support

Families may face several challenges when supporting treatment, including:

• The individual denying that there is a problem or refusing treatment.

• Fear of social judgment and stigma associated with addiction.

• Lack of knowledge about mescaline and its effects.

• Confusing support with surveillance, punishment, or excessive control.

• Family conflicts and poor communication.

• Emotional exhaustion among family members.

• Repeated relapse and the frustration associated with it.

• Difficulty accessing specialized treatment services.

How Can These Barriers Be Overcome?

These challenges can be reduced through health education, encouraging open communication within the family, and seeking professional assistance when necessary. Families should establish clear boundaries regarding substance use without resorting to violence, humiliation, or threats.

Relapse should also be viewed as a signal that the treatment plan may need to be reassessed rather than as a reason to abandon or reject the individual.

How Does Mescaline Affect the Central Nervous System?

Mescaline primarily affects the central nervous system through its activity on the serotonin system in the brain, particularly the 5-HT2A receptors. This activity alters the functioning of neural networks involved in perception, attention, thinking, and sensory information processing, helping explain many of its hallucinogenic and psychological effects.

First: Activation of Serotonin Receptors

Mescaline is considered a classic psychedelic and acts primarily as an agonist at 5-HT2A receptors, which are widely distributed in the cerebral cortex.

Activation of these receptors alters neural signaling and the way the brain processes information from the senses and internal signals. This can result in noticeable changes in perception, emotions, and thinking.

Second: Changes in Cortical Activity

Mescaline can alter the activity of neural networks involved in perception, attention, and thinking.

These changes may be experienced as:

• Altered perception of colors and shapes.

• Changes in the perception of time and distance.

• Increased associations between thoughts or changes in the normal flow of thinking.

• Difficulty concentrating or thinking normally.

• Changes in the perception of the surrounding environment and reality.

Third: Changes in Sensory Information Processing

The brain continuously receives large amounts of sensory information and selectively organizes and processes it to help a person interact with their surroundings.

Mescaline can affect some of these information-processing mechanisms, potentially making certain sensory stimuli appear more intense or significant than usual. In some cases, this may result in perceptual disturbances or hallucinations.

Fourth: Effects on the Sense of Self

Psychedelic substances can alter the activity of brain networks involved in internal thought and the sense of self.

As a result, a person under the influence of mescaline may experience changes in how they perceive themselves or their surroundings. Some individuals may also experience a temporary alteration in the usual sense of boundaries between themselves and the external world.

Fifth: Effects on the Autonomic Nervous System

Mescaline's effects are not limited to perception and thinking. It can also affect the autonomic nervous system, which regulates various involuntary bodily functions.

These effects may include:

• Increased heart rate.

• Elevated blood pressure.

• Dilated pupils.

• Increased sweating.

• Nausea and vomiting.

• Changes in body temperature in some individuals.

What Are the Harms of Mescaline?

Mescaline is a hallucinogenic substance that affects the central nervous system. It occurs naturally in certain types of cacti, most notably peyote and San Pedro cactus. Mescaline primarily acts through the brain's serotonin system, particularly the 5-HT2A receptors. Its effects do not occur with the same intensity in everyone; however, they can be powerful and unpredictable and may result in psychological or physical complications.

First: Physical Harms

Several physical effects may occur while mescaline is active in the body, including:

• Nausea and vomiting, which are relatively common effects.

• Increased heart rate and elevated blood pressure.

• Sweating, dry mouth, and dilated pupils.

• Tremors or impaired motor coordination.

• Dizziness and headache.

• Increased body temperature in some cases.

• Sleep disturbances and fatigue after the effects wear off.

In severe cases, or when mescaline is used together with other substances, more serious health complications may occur. Therefore, severe or unusual symptoms require prompt medical evaluation.

Second: Psychological and Mental Effects

Because mescaline is a hallucinogenic substance, it may cause significant changes in perception and consciousness, including:

• Visual hallucinations and, in some cases, sensory or auditory hallucinations.

• Altered perception of time, distance, colors, and shapes.

• Confused thinking and difficulty concentrating.

• Impaired judgment and decision-making.

• Anxiety, intense fear, or panic attacks.

• Confusion and a distorted sense of reality.

• Paranoia and unrealistic thoughts.

• Acute psychotic symptoms in some cases.

The psychological experience may be particularly distressing when a person is in an unsafe environment or has a pre-existing vulnerability to anxiety or certain mental health disorders.

Third: Long-Term Risks of Mescaline Use

Scientific information regarding the long-term effects of mescaline remains limited compared with some other psychoactive substances. Therefore, claims that exaggerate its long-term effects should be interpreted with caution.

Nevertheless, repeated use or exposure to intense hallucinogenic experiences may be associated with several potential risks:

1. Persistent Perceptual Disturbances

Some individuals may experience recurrent or persistent visual disturbances after the effects of the substance have ended, such as halos, flashes, or visual trails around objects. These symptoms may be associated with a condition known as Hallucinogen Persisting Perception Disorder (HPPD).

2. Psychological Problems

Some individuals may experience persistent anxiety, sleep disturbances, or changes in their sense of reality. Mescaline use may also worsen certain pre-existing mental health conditions.

3. Psychotic Symptoms

In rare cases, psychotic symptoms may persist after the effects of the substance have worn off. This possibility is particularly relevant for individuals with a personal or family predisposition to psychotic disorders.

4. Problems Associated with Repeated Use

Repeated use may interfere with daily life, including education, employment, and social relationships, even in the absence of clear physical dependence.

5. Accidents and Injuries

Changes in perception and judgment while under the influence may increase the risk of falls, accidents, or dangerous behavior. This represents one of the important indirect risks associated with mescaline use.

6. Tolerance

Relative tolerance may develop with repeated use of psychedelics, meaning that the response to the effects may become weaker when use occurs repeatedly over short periods. Tolerance should not be confused with addiction, as these are distinct concepts.

Does Mescaline Cause Permanent Brain Damage?

There is no strong evidence demonstrating that mescaline inevitably causes permanent neurological damage in humans. However, long-term studies in humans remain limited. The lack of strong evidence for permanent neurological damage does not mean that mescaline is free from psychological or perceptual risks.

Treatment of Mescaline Use Disorder

If mescaline use becomes compulsive or a person is unable to control their use, treatment is possible. However, there is currently no specific approved medication that directly treats mescaline use disorder. Treatment therefore focuses on medical and psychological assessment, stopping use, and addressing psychological, behavioral, or co-occurring conditions.

How Is Treatment Provided?

1. Medical and Psychological Assessment

Treatment begins with a comprehensive assessment by a physician or substance use disorder specialist. This may include evaluating the pattern of use, mental health status, sleep problems, and any medications or other substances the person may be using.

The assessment helps determine the level of risk and identify the most appropriate type of treatment.

2. Stopping Mescaline Use

Mescaline is not generally known to cause a severe physical withdrawal syndrome like that associated with certain other substances. Therefore, most people do not require medication specifically for what is sometimes referred to as "mescaline withdrawal."

However, psychological difficulties, sleep disturbances, or cravings to use the substance again may occur after stopping, and the individual may benefit from follow-up care and psychological support.

3. Psychotherapy

Psychotherapy is an important component of treatment for mescaline use disorder. Cognitive Behavioral Therapy (CBT) can help individuals:

• Identify thoughts and situations that trigger substance use.

• Recognize factors associated with cravings.

• Develop safer ways of coping with stress and negative emotions.

• Change behavioral patterns associated with substance use.

• Develop relapse-prevention skills.

Other psychological approaches may also be used depending on the individual's needs and clinical condition.

4. Treatment of Co-Occurring Mental Health Conditions

If mescaline use is associated with depression, anxiety, or another mental health disorder, the underlying condition should be addressed as part of a comprehensive treatment plan. Some individuals may benefit from psychotherapy, medication, or both, depending on the physician's assessment.

5. Follow-Up and Relapse Prevention

Relapse prevention involves developing a plan to manage triggers and cravings, avoid situations associated with substance use, and seek support from trusted individuals or specialized treatment services when necessary.

6. Specialized or Residential Treatment

Specialized treatment programs or temporary residential treatment may be appropriate in certain situations, particularly when substance use is severe, significant psychotic or psychiatric symptoms are present, or the home environment is not suitable for safe recovery.

Medications for Mescaline Use Disorder

There is currently no approved medication that directly treats dependence on mescaline. Pharmacological treatment is therefore generally directed toward associated symptoms and complications, rather than mescaline itself.

1. During Acute Intoxication

If a person is under the influence of mescaline and experiences severe agitation, acute anxiety, or distressing hallucinations, a physician may use appropriate medications in a medical setting while monitoring vital signs and the person's physical condition.

2. Psychotic Symptoms

If severe psychotic symptoms occur or persist after the effects of the substance have ended, a physician may consider an antipsychotic medication following an appropriate clinical assessment. The choice and duration of treatment depend on the symptoms and the individual's response.

3. Anxiety and Depression

If the individual has an anxiety or depressive disorder, these conditions should be assessed and treated independently. A physician may recommend psychological or pharmacological treatment depending on the diagnosis and overall health status.

4. Hallucinogen Persisting Perception Disorder (HPPD)

If persistent visual disturbances develop after mescaline use, there is currently no single standardized or reliably effective medication for HPPD. The individual should undergo a specialist assessment to characterize the symptoms and rule out other possible causes.

5. Withdrawal Symptoms

Mescaline does not typically produce a severe and characteristic physical withdrawal syndrome. Consequently, there are no standard withdrawal medications specifically indicated for mescaline. Treatment generally focuses on psychological follow-up, relapse prevention, and management of co-occurring problems.

What Is the Main Treatment Approach?

Treatment primarily relies on medical and psychological assessment, psychotherapy, and family and social support, with medications used when necessary to address specific symptoms or co-occurring disorders.

Individuals should not take sedatives, antipsychotics, or other medications on their own to treat the effects of mescaline. Treatment should be determined by a qualified healthcare professional based on the person's condition and symptoms.

Psychotherapy for Mescaline Use Disorder

Psychotherapy plays an important role in addressing the psychological and behavioral aspects of mescaline use disorder. It aims to help individuals understand the reasons behind their substance use, address associated psychological problems, develop healthier coping skills, and reduce the risk of relapse.

First: Individual Psychotherapy

Individual therapy allows the person to work with a therapist in a safe and confidential environment to understand factors that contributed to mescaline use or continued use, such as psychological stress, emotional difficulties, or challenging life experiences. It can also help the individual develop healthier ways of managing emotions and situations that may trigger substance use.

Second: Group Therapy

Group therapy provides a supportive environment in which people with similar substance use problems can interact. It may help reduce feelings of isolation, facilitate the exchange of experiences, develop coping skills for cravings, and build a supportive social network.

Third: Holistic Support

The treatment plan may incorporate several areas aimed at improving psychological, physical, and social well-being, such as establishing regular sleep patterns, physical activity, and relaxation or stress-management techniques. Supportive approaches such as mindfulness or meditation may be used when appropriate, provided they are part of a treatment plan based on evidence-based approaches rather than a substitute for them.

Cognitive Behavioral Therapy (CBT)

Cognitive Behavioral Therapy is an important approach used in the treatment of substance use disorders. It focuses on the relationship between thoughts, emotions, and behaviors and can help individuals:

• Identify thought patterns and behaviors associated with substance use.

• Recognize situations and emotions that increase the desire to use mescaline.

• Reassess thoughts that may justify returning to substance use.

• Develop healthy strategies for managing stress and cravings.

• Acquire skills that support relapse prevention.

Dialectical Behavior Therapy (DBT)

DBT may help individuals develop skills for emotional regulation, distress tolerance, and managing impulsivity and behaviors that may increase the risk of returning to substance use, particularly when significant difficulties with emotional regulation are present.

Motivational Interviewing (MI)

Motivational Interviewing focuses on strengthening internal motivation for change. It helps individuals explore both the reasons they continue to use the substance and their reasons for wanting to stop, while respecting their autonomy and encouraging realistic recovery goals.

Contingency Management (CM)

Contingency Management uses positive reinforcement to encourage desired behaviors, such as treatment adherence or abstinence from substance use, according to a structured treatment program developed by a qualified professional.

Importance of Combining Treatment Approaches

There is no single treatment approach that is appropriate for everyone. A qualified healthcare professional determines the most suitable approach or combination of approaches based on the severity of use, mental health status, presence of other disorders, and family and social circumstances.