What Is Zaza? The Dangerous Rise of Tianeptine Abuse in the U.S.

In recent years, a substance known as “Zaza” has been making headlines across the United States. Sold at gas stations and convenience stores under names like “Neptune’s Fix” and “Tianna,” Zaza is far from a harmless dietary supplement. It’s the street name for tianeptine, an antidepressant turned dangerous street drug, now drawing urgent attention from medical professionals, regulators, and public health officials.

As reports of tianeptine abuse, withdrawal symptoms, and even fatalities grow, it’s important to understand: what is Zaza, and why is it being called “gas station heroin”?

From Antidepressant to Street Drug: What Is Zaza (Tianeptine)?

Tianeptine is an atypical tricyclic antidepressant first developed in France during the 1980s. Unlike traditional antidepressants, which typically work by increasing serotonin levels in the brain, tianeptine uniquely enhances serotonin reuptake. It has been used in Europe and parts of Asia to treat depression, irritable bowel syndrome, and asthma.[1]

Despite its therapeutic uses abroad, tianeptine has never been approved for medical use in the United States. It remains an unscheduled pharmaceutical agent, meaning it’s not federally regulated as a controlled substance, although multiple states have since banned it due to its abuse potential.

The real danger? In high doses, tianeptine mimics the opioid agonist effects of substances like morphine—acting on the mu opioid receptor, producing euphoria, sedation, and, over time, physical dependence.[2]

Zaza, Neptune’s Fix, and Other Brand Names: How Gas Station Heroin Slipped Through the Cracks

Marketed as dietary supplements, products like Zaza and Neptune’s Fix are sold openly in gas stations, smoke shops, and online marketplaces. The packaging often includes vague health claims, lacking any mention of the serious adverse effects that can follow.

Consumers—especially those struggling with opioid use disorder or other substance use disorders—are drawn to tianeptine’s ability to stave off opioid withdrawal symptoms or provide a legal high. The illusion of legality and accessibility masks its serious risks.

Alarming Data from Poison Control Centers and Health Agencies

The rise in tianeptine exposures has become a significant concern for health authorities. According to the National Poison Data System, tianeptine exposures reported to U.S. poison control centers increased dramatically—from just 11 in 2014 to more than 150 in 2020.[3]

A 2022 report and literature review in the Clinical Toxicology journal described several cases of tianeptine intoxication, including cardiac arrest, respiratory depression, severe illness, and fatalities involving tianeptine.[4] These are not isolated incidents. The report warns of serious harm even at moderate dosages.

Tianeptine Withdrawal Symptoms: A Hidden Epidemic

Perhaps the most troubling aspect of Zaza is the severity of its withdrawal symptoms. Users describe it as more intense than benzodiazepine withdrawal or even traditional opioid withdrawal.

Tianeptine withdrawal symptoms include:

• Muscle and abdominal pain
• Intense anxiety and depression
• Vomiting and gastrointestinal distress
• Cold sweats and tremors
• Insomnia and agitation
• Respiratory depression
  

For individuals who take escalating doses over time, detoxing without medical assistance can be dangerous, sometimes requiring medical detox in a controlled setting. These symptoms are especially severe in those with a history of psychiatric disorders or co-occurring mental health conditions.

Why Is the Antidepressant Tianeptine Still Legal in Some States?

Tianeptine remains unregulated federally, though individual states like Michigan, Alabama, Tennessee, and Georgia have moved to ban tianeptine. In many other states, it still sits on store shelves under various guises, raising red flags about the gaps in dietary supplement oversight.

The FDA warns consumers not to use products containing tianeptine. In 2023, the agency issued multiple public safety alerts about tianeptine products linked to hospitalizations and deaths.[4]

Tianeptine Abuse and Dependence: What the Science Says

Current research clearly supports that tianeptine abuse and dependence are real, rising, and medically significant. Individuals often begin using tianeptine to self-medicate, but over time, they develop tianeptine use disorder, characterized by compulsive use, cravings, and an inability to quit despite consequences.

In urine drug screenings, tianeptine is often undetectable, making it harder to diagnose in clinical settings. This complicates the care for users presenting with serious harm but no identifiable cause until further toxicology tests are run.

Risk Factors and Patterns of Use

The risk of developing Zaza addiction appears higher among individuals with:

• Prior history of opioid addiction
• Untreated or under-treated mental health issues
• Access to high doses of tianeptine via online or retail sales
• Polysubstance use involving other substances like alcohol or benzodiazepines
  

Tianeptine is often consumed in powder form, capsules, or liquid extracts. Repeated use leads to increasing tolerance, which drives more frequent dosing and escalates health risks.

Public Health Response and The Road Ahead

The tianeptine crisis mirrors earlier stages of the U.S. opioid epidemic. With growing recognition of the danger, public health experts urge a multi-pronged response:

• Legislation: Expanding state and federal regulation of tianeptine products.
• Awareness: Educating communities about the dangers of products sold under misleading labels like Zaza.
• Intervention: Increasing access to recovery journey resources, medical detox, and long-term treatment for tianeptine misuse.
  

Clinicians, too, are becoming more aware of tianeptine effects reported and are starting to ask about supplement and gas station purchases when assessing unexplained illness.

Get Connected to Treatment for Addiction to the Street Drug Zaza

Zaza may be packaged like a supplement and sold like a soft drink, but its effects are anything but benign. As a synthetic opioid with high abuse potential, tianeptine presents a significant public health risk. Its ability to mimic the effects of heroin while flying under the legal radar is deeply troubling.

For those struggling with tianeptine use, there is help. Contact THC Recovery today to learn more about how our evidence-based program can help you recover from Zaza addiction. 

Frequently Asked Questions About Zaza and Tianeptine

1. Is Zaza the same in every product, or do formulations vary?

No, formulations can vary significantly between products labeled as Zaza, Tianna, or Neptune’s Fix. Some contain pure tianeptine sodium or tianeptine sulfate, while others may include additional substances, stimulants, or fillers. Because these are unregulated products, there’s no guarantee of ingredient consistency or dosage, which increases the risk of accidental overdose or unexpected side effects.

2. Why do people turn to Zaza instead of traditional antidepressants or opioids?

Many users turn to Zaza out of desperation—often to self-medicate for untreated depression, anxiety, or opioid withdrawal symptoms. Others use it to bypass prescription regulations or drug testing systems. The fact that it’s easily accessible and legal in some areas makes it a target for vulnerable individuals seeking relief outside formal healthcare systems.

3. Can tianeptine be detected in standard drug tests?

Typically, tianeptine does not show up on standard urine drug screens, which are designed to detect more common substances like opioids, THC, or amphetamines. Specialized toxicology panels can detect it, but they are rarely used unless there is strong clinical suspicion. This makes the diagnosis and treatment of tianeptine-related issues more complicated for healthcare providers.

4. Are there any legitimate supplements or medications that might contain tianeptine unintentionally?

No legitimate dietary supplements or FDA-approved medications in the U.S. contain tianeptine. If it appears in a product, it is either intentionally adulterated or falsely marketed as a nootropic or mood enhancer. The presence of tianeptine in over-the-counter products is not due to contamination—it’s a deliberate inclusion in unregulated, deceptive products.

5. What should I do if I suspect someone is using Zaza or experiencing tianeptine withdrawal?

Encourage the person to seek medical attention immediately. Do not attempt to manage tianeptine withdrawal symptoms at home, as they can be severe and unpredictable. Contact a poison control center, addiction specialist, or emergency services if symptoms worsen. Withdrawal should be managed under medical supervision, particularly if other substances are involved.

6. Is the FDA planning to schedule tianeptine as a controlled substance?

As of now, tianeptine is not federally scheduled, though the FDA has issued multiple warnings and urged consumers to avoid products containing it. Some experts believe federal scheduling is likely, given the escalating doses reported in poison center data and increasing public health concerns. Legislative efforts at the state level may also push national policy changes in the near future.

References:

1. Science Direct: Tianeptine – an overview
2. University of Virginia Health: Tianeptine
3. The Centers for Disease Control and Prevention (CDC): Characteristics of Tianeptine Exposures Reported to the National Poison Data System 
4. The Food and Drug Administration (FDA): Tianeptine Products Linked to Serious Harm, Overdoses, Death