Overdose or emergency? Call now Hotlines · US 911 · UK 999 · EU 112 · AU 000 · IN 112 · 988 (US crisis) Hotlines
K
Opioids

Kratom (Mitragyna speciosa)

Street names: Ketum, Thang, Kakuam, Biak

⚡What it does

  • Low dose: stimulant energy, focus
  • High dose: opioid-like sedation, pain relief
  • Mitragynine acts on opioid receptors

⚠Key risks

  • Opioid-like dependence and withdrawal (insomnia, muscle aches, irritability, diarrhea)
  • FDA links to seizures, liver damage, hallucinations
  • Salmonella contamination — 2018 outbreak, 35+ deaths linked to tainted kratom
  • Unregulated products — unknown alkaloid content, contamination
  • Naloxone DOES reverse kratom overdose (opioid receptor activity)
  • Gateway to opioid use for some

✚Overdose signs

  • Seizures
  • Respiratory depression (high doses)
  • Liver injury signs (jaundice, dark urine)
  • Hallucinations, confusion

Category comparison — Opioids

SubstanceClassTop risksStreet price
Kratom (Mitragyna speciosa)Not federally scheduledOpioid-like dependence and withdrawal (insomnia, muscle aches, irritability, diarrhea); FDA links to seizures, liver damage, hallucinations~$10–$30 per ounce powder
HeroinSchedule IExtremely addictive — physical dependence in weeks; Overdose: breathing slows or stops~$10–$40 per bag
FentanylSchedule IIRespiratory depression; Addiction in days~$20–$40 per counterfeit pill
Fentanyl HCl (powder)Schedule II / analogue prosecutionsLab-purity powder is far stronger than street mixes; Weighing errors are fatal~$60–$120/gram wholesale equivalent
AcetylfentanylSchedule I~5–15× weaker than fentanyl but still deadly at gram-level mistakes; Frequent cause of cluster overdoses~$25–$60/g where found
Furanylfentanyl (Fu-F)Schedule ILinked to hundreds of fatal overdoses 2016–2018; Potency similar to fentanyl~$20–$50/g
Street prices are regional estimates. Potency and cuts vary constantly.

?Frequently asked questions

What does Kratom (Mitragyna speciosa) look like?

Green powder, capsules, extracts, liquid shots sold at smoke shops/gas stations

What are the signs of a Kratom (Mitragyna speciosa) overdose?

Seizures; Respiratory depression (high doses); Liver injury signs (jaundice, dark urine) Call emergency services immediately and give naloxone if available — it reverses opioid overdoses.

How addictive is it?

Opioid-like dependence and withdrawal (insomnia, muscle aches, irritability, diarrhea) Dependence can develop with regular use.

🔗Sources & further reading

Facts on this page are compiled from these primary sources. External links open in a new tab.