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Atypical antidepressant with opioid agonist activity · Not federally controlled

Tianeptine Also called Gas station heroin, Za Za, Tianaa, Neptune's Fix

Tianeptine is an antidepressant approved in some European, Asian, and Latin American countries but never in the US. At high doses it activates opioid receptors, and it has been sold in gas stations and online as a supplement, earning the nickname "gas station heroin". The FDA has repeatedly warned against it, many states ban it, and in July 2026 the DEA proposed placing it in Schedule I.

Unapproved or unregulated

Draft, awaiting medical review. Updated October 5, 2026.

Onset
About 1 hour
Duration
2 to 4 hours
Naloxone reverses it?
Yes
Dependence risk
High

Tianeptine at a glance: schedule, half-life, and class

Chemical
Tianeptine sodium or sulfate
Product names
Za Za, Tianaa, Neptune's Fix, TD Red
Drug class
Atypical tricyclic antidepressant; mu-opioid agonist at high doses
US legal status
Not federally controlled; Schedule I proposed (July 2026); banned in about 15 states
FDA status
Not approved; warnings and import alerts
Approved elsewhere
Prescribed for depression in France and other countries (Stablon, Coaxil)
Onset
About 1 hour
Duration
2 to 4 hours
Half-life
About 2.5 hours
Reversal agent
Naloxone

What is tianeptine?

Tianeptine was developed in France in the 1960s and is prescribed for depression in several countries at 12.5 mg three times a day. At much higher doses, it acts as a full agonist at mu-opioid receptors, causing opioid effects.[1]

In the US it is sold illegally as a dietary supplement or "research chemical" in gas stations, smoke shops, and online, sometimes in amounts hundreds of times the antidepressant dose.

Tianeptine effects and how long they last

At high doses tianeptine causes euphoria, relaxation, and pain relief similar to opioids, along with drowsiness, nausea, and constipation. Its short half-life leads people to redose many times a day.[1]

Tianeptine side effects and risks

Overdose and death: the FDA has linked tianeptine products to seizures, loss of consciousness, and deaths, both alone and with other drugs. Poison center calls rose from 4 in 2013 to about 350 in 2024.[1]

Contamination: FDA testing found some products, such as Neptune's Fix, contained synthetic cannabinoids and other undeclared drugs.[1]

Dependence: daily users rapidly develop severe opioid-like dependence, often taking grams per day.

Tianeptine interactions: what is dangerous to mix with it

Combined withWhat happensRisk level
OpioidsAdditive breathing suppressionHigh risk
Benzodiazepines, alcohol, sedativesDeep sedation, slowed breathingHigh risk
Other antidepressantsUnpredictable effectsAvoid

This is not a full list. Unregulated drugs often contain other substances, which makes any combination less predictable.

Tianeptine overdose: signs and what to do

Tianeptine overdose looks like opioid overdose: extreme sleepiness, slow or stopped breathing, pinpoint pupils, and unresponsiveness. Agitation, fast heartbeat, confusion, and seizures have also been reported. Naloxone reverses its opioid effects.[1]

If someone may have overdosed

  • Call 911 if the person is unresponsive, cannot be woken, has blue or gray lips, or is breathing slowly or not at all.
  • Give naloxone (Narcan or a generic nasal spray, sold without a prescription) into one nostril. If there is no response after 2 to 3 minutes, give another dose.
  • If you are trained, give rescue breaths. Otherwise place the person on their side so they do not choke.
  • Stay with them. Naloxone can wear off before tianeptine does, so the overdose can return even after the person wakes up.
  • Most states have Good Samaritan laws that protect people who call 911 for an overdose from some drug charges.

Is tianeptine addictive, and what is withdrawal like?

Tianeptine withdrawal resembles opioid withdrawal and can be severe after heavy use.[1]

  1. 8 to 24 hoursSymptoms beginAnxiety, sweating, runny nose, muscle aches, cravings.
  2. Days 1 to 4PeakDiarrhea, vomiting, insomnia, agitation, and in some cases confusion.
  3. 1 to 2 weeksResolvesPhysical symptoms ease; mood symptoms can last longer.

Hospitals have treated tianeptine withdrawal with buprenorphine or methadone, as with other opioids.

Where can someone get help with tianeptine use?

Tianeptine dependence responds to the same treatments as opioid use disorder, including buprenorphine.

  • SAMHSA National Helpline: 1-800-662-4357. Free, confidential, 24 hours a day, in English and Spanish. It gives referrals to local treatment and support.[3]
  • FindTreatment.gov: a federal locator for state-licensed treatment programs, searchable by location, payment, and type of care.[4]
  • 988 Suicide and Crisis Lifeline: call or text 988 for a mental health or substance use crisis.
  • Your own clinician: a primary care doctor can screen, treat, and refer, and can discuss medicines that support recovery where they exist.

Common questions about tianeptine

Why is tianeptine called gas station heroin?

Because it is sold in gas stations and smoke shops and causes opioid-like effects, dependence, and overdoses at high doses.

Is tianeptine legal in the US?

It is not FDA-approved and cannot legally be sold as a supplement. About 15 states ban it, and the DEA proposed Schedule I in July 2026.

Does naloxone work on tianeptine?

Yes. Naloxone reverses its opioid effects in overdose.

Is tianeptine an antidepressant?

Yes, in some countries at low prescribed doses. The US has never approved it.

Sources

  1. Tianeptine products linked to serious harm, overdoses, death. US Food and Drug Administration.
  2. Schedules of Controlled Substances: Placement of Tianeptine in Schedule I, proposed rule. Federal Register, July 8, 2026.
  3. National Helpline. Substance Abuse and Mental Health Services Administration.
  4. FindTreatment.gov. Substance Abuse and Mental Health Services Administration.
  5. International drug control conventions. United Nations Office on Drugs and Crime.
Read the Tianeptine guideKey takeaways, quick facts, and answers to common questions.

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In an emergency in the US, call 911. Poison Help: 1-800-222-1222.