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Xylazine

Published on December 2, 2025 at 3:00
Synonyms The main synonyms are as follows:
  • Zombie drug
  • Tranq
Classification Depressant:
  • This term refers to a substance that slows brain function. It can reduce wakefulness and cause a calming effect.
Mechanism of action
  • Xylazine binds to alpha-2 adrenergic receptors. These receptors are located in different parts of the body and have several functions. Among other things, they regulate the secretion of noradrenaline. This molecule plays a role in the body's response to stress.
Routes of administration
  • Often injected, but can also be ingested by mouth, snorted, or smoked.

Effects sought out by the user

Xylazine is used as a tranquilizer in animals, but it is not approved for human use. Most of the time, the person taking xylazine doesn't even know they're taking it. This drug is often combined with other drugs (e.g., fentanyl), as it is less expensive and sometimes more accessible. It can prolong the effect of other depressants or reduce the adverse effects associated with stimulant drugs.

When taken alone, xylazine may cause the following effects:

  • Euphoria (feeling of well-being)
  • Pain relief
  • Muscle relaxation
  • Reduced level of consciousness

Common adverse effects

Prolonged use of xylazine may cause sores (e.g., ulcers or abscesses) to appear in various places on the body. This may occur no matter how the drug is administered. Xylazine can reduce the amount of blood reaching the skin, slowing wound healing and increasing the risk of infection.

Other adverse effects are possible:

  • Fatigue
  • Dizziness
  • Increased blood sugar levels
  • Blurred vision
  • Confusion
  • Difficulty speaking or articulating

Overdose effects

  • Respiratory depression
  • Reduced blood pressure
  • Reduced heart rate
  • Increased blood sugar levels
  • Reduced body temperature
  • Loss of consciousness
  • Decreased pupil size
  • Drowsiness

The effects of xylazine overdose are similar to those associated with opioids. When combined with depressants such as opioids, these effects can be amplified, posing a greater risk of overdose for the user.

Tolerance (need to increase the dose to feel the same effect)

Yes, possibly, but little data is available on this subject.

Addiction

Yes, chronic consumption can cause physical dependence.

Withdrawal

Yes. Possible symptoms include the following:

  • Anxiety
  • Irritability
  • Agitation
  • Severe hypertension
  • Dysphoria (feelings of unease, sadness, etc.)

Onset and duration of action

There is little available data on xylazine's effects on humans. Depending on the dose, route of administration, and drugs with which xylazine is combined, its effects may be felt within minutes and last 6 or 8 hours, or even longer.

Screening

Xylazine is rapidly eliminated from the body, so it can be difficult to detect using conventional screening methods. Specialized laboratories can perform analyses to identify the substance. Urine strips are also available to confirm the presence of this drug in urine, but false negatives are possible.

Intoxication management

  • No antidote is available.
  • Treatment is mainly symptomatic.

Symptoms of xylazine intoxication are similar to those associated with opioids. Since xylazine is frequently combined with certain opioids, it is recommended to administer naloxone in the event of overdose symptoms. Naloxone is available in pharmacies. It likely does not reverse the effects of xylazine, but it does reverse the effects of opioids that may be associated with it.

Many different street drugs are sold under the same name. Furthermore, nothing guarantees the quantity, purity or even the content of a street drug in spite of the fact that it may, in some cases, look like medication.

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