Krokodil addiction is opioid use disorder involving desomorphine, an opioid prepared and injected as a homemade mixture, together with the wound and bone damage that mixture causes. Originating in Russia in the early 2000s as a cheaper alternative to heroin, the drug is synthesized using codeine and toxic household ingredients like gasoline, iodine, and hydrochloric acid.
Desomorphine produces a heroin-like opioid effect at greater potency and over a shorter duration, which raises injection frequency and multiplies exposure to the mixture's corrosive byproducts.
What is Krokodil?
Krokodil is the street name for desomorphine, a semi-synthetic opioid about 10 times more potent than morphine that is prepared from codeine outside any pharmaceutical setting and injected intravenously. The name comes from the Russian word for crocodile and describes the scaly skin that forms at injection sites.
Desomorphine was first synthesized in the 1930s in the United States, has no accepted medical use there, and has been a controlled substance since 1936. The Drug Enforcement Administration records that potency, along with the tolerance, addiction and dependence that follow desomorphine abuse.
People who use krokodil continue injecting through severe skin damage, tissue death and gangrene. Corrosive residues from homemade preparation, not the opioid itself, cause that tissue damage.
Why Is Krokodil Also Spelled Crocodil Or Called The Crocodile Drug?
Krokodil and crocodil name the same drug, desomorphine, and the street name has two documented origins: the crocodile-like scaly skin that forms at injection sites, and alpha-chlorocodide, the first chemical intermediate formed when codeine is converted toward desomorphine.
Five names for desomorphine appear across two authoritative sources. The Drug Enforcement Administration's Diversion Control Division names Krokodil and Crocodil as the street names for desomorphine in its December 2019 Drug and Chemical Evaluation Section monograph, so a search for "crocodil" and a search for "krokodil" reach one drug and one Schedule I listing. Angulo Florez, Diego Hernando and colleagues add Crocodile, Croc and Krok in their 2017 review "Desomorphine (Krokodil): An overview of its chemistry, pharmacology, metabolism, toxicology and analysis" in Drug and Alcohol Dependence, volume 173, pages 59 to 68.
Repeated injection leaves the skin around the injection site greenish and scaly, an appearance the Drug Enforcement Administration attributes to damaged blood vessels, thrombosis and damaged soft tissues surrounding the injection sites rather than to desomorphine itself. The same monograph records that the skin's appearance is similar to a crocodile's scaled and rugged skin. That resemblance is what the Russian word krokodil describes, and it is the only origin the DEA monograph gives.
Alpha-chlorocodide supplies the second origin, and the December 2019 DEA monograph never mentions it. Katselou M, Papoutsis I, Nikolaou P, Spiliopoulou C and Athanaselis S traced the street name to alpha-chlorocodide, the first intermediate codeine forms on the way to desomorphine, in "A 'Krokodil' emerges from the murky waters of addiction. Abuse trends of an old drug", published in 2014 in Life Sciences, volume 102, issue 2, pages 81 to 87. Angulo Florez and colleagues carried that finding into their 2017 Drug and Alcohol Dependence review and credited Katselou and colleagues for it. The street name therefore holds a chemical reference and a clinical description at the same time.
Has Crocodil Use Been Confirmed By US Laboratories?
No United States crocodil case carries analytical confirmation of desomorphine. The National Forensic Laboratory Information System recorded 2 drug reports identified as desomorphine in 2004 and none between 2004 and the Drug Enforcement Administration's December 2019 review.
The National Forensic Laboratory Information System is the Drug Enforcement Administration database that collects scientifically verified results on drug items and cases analyzed by federal, state and local forensic laboratories. Two drug reports submitted to those laboratories in 2004 were identified as desomorphine. The December 2019 monograph records no desomorphine exhibit after 2004, which puts the entire American forensic record for the drug behind the crocodil reports at 2 confirmed items across 15 years.
Mullins ME and Schwarz ES stated the confirmation problem directly in "Krokodil in the United States is an urban legend and not a medical fact", published in 2014 in The American Journal of Medicine, volume 127, issue 7, page e25. The two medical toxicologists at Washington University School of Medicine in Saint Louis wrote that with no analytical confirmation from the patient's bodily fluids or from the injected substance, accepting krokodil as the cause of the reported lesions is difficult. Mullins and Schwarz named 3 alternative explanations for the lesions: soft tissue infections, contaminants in injected heroin, and levamisole, a common cocaine adulterant that produces similar skin damage. The two authors concluded that krokodil was unlikely to have caused that patient's skin lesions, and cited the Drug Enforcement Administration's 2014 statement that there are no confirmed cases of krokodil abuse in the United States. The wound pattern behind those reports matches the soft tissue complications documented among people who inject heroin, covered in Heroin Addiction.
Desomorphine has been controlled in the United States since 1936 and sits in Schedule I of the Controlled Substances Act. Switzerland used desomorphine medically under the brand name Permonid; the United States recognizes no accepted medical use for it. That legal status is identical across every spelling, so crocodil, croc and krok all name one Schedule I opioid, and the tolerance, addiction and dependence the DEA monograph records with desomorphine abuse place it inside Opioid Use Disorder (OUD). Spelling and forensic confirmation settle questions of nomenclature and laboratory evidence, while the signs, symptoms and effects of krokodil documented next describe what the injected mixture does to skin, soft tissue and internal organs.
What Are The Signs, Symptoms, and Effects Of Krokodil?
Krokodil injection produces 6 categories of documented harm, running from skin and soft tissue destruction at the injection site through systemic infection and organ damage to death. Alves EA, Grund JPC, Afonso CM, Netto ADP, Carvalho F and Dinis-Oliveira RJ recorded these signs and symptoms in "The harmful chemistry behind krokodil (desomorphine) synthesis and mechanisms of toxicity", published in 2015 in Forensic Science International, volume 249, pages 207 to 213. The 6 categories are:
- Severe skin and soft tissue injury: thrombophlebitis, deep ulceration, gangrene and necrosis, progressing to limb amputation.
- Systemic infection: pneumonia, sepsis, meningitis and osteomyelitis, the infection of bone.
- Neurological impairment: degraded motor control and memory loss.
- Organ damage: liver injury and renal impairment.
- Psychiatric deterioration: decline in cognition and psychological stability.
- Death: the endpoint Alves and colleagues record for untreated progression.
Bone death in the jaw is documented alongside the skin and soft tissue injuries. Poghosyan YM, Hakobyan KA, Poghosyan AY and Avetisyan EK treated 40 people with krokodil-related osteonecrosis, the clinical term for bone death, and recorded mandibular involvement in 52.5 percent of cases, maxillary involvement in 27.5 percent and both jaws in 20 percent, in "Surgical treatment of jaw osteonecrosis in Krokodil drug addicted patients", published in 2014 in the Journal of Cranio-Maxillofacial Surgery, volume 42, pages 1639 to 1643.
Does Krokodil Actually Eat Flesh?
Krokodil does not eat flesh. The injected mixture destroys tissue chemically, and the resulting necrosis, gangrene and ulceration expose muscle, tendon and bone at and beyond the injection site, which is what the "flesh-eating" label describes.
Corrosive byproducts left in the injected liquid drive that damage rather than desomorphine itself. Jeanna Marraffa, a clinical toxicologist at the Upstate New York Poison Center, described the danger of opioid contaminants on the 2013 Upstate Medical University Informed Patient Podcast. Alves and colleagues reached the same conclusion, attributing thrombophlebitis, ulceration, gangrene and necrosis to synthesis byproducts rather than to the opioid.
Who Uses Krokodil?
Krokodil is used mainly by young adults in Russia and Ukraine, who prepare desomorphine from codeine and inject it intravenously as a cheaper substitute for heroin. Desomorphine abuse appeared internationally in 2002 and was reported as increasing among Russian young adults by 2009, according to the Drug Enforcement Administration Diversion Control Division 2019 Drug and Chemical Evaluation Section monograph on desomorphine.
Geography narrows the population further. Grund JP, Latypov A and Harris M placed krokodil inside Russian and Ukrainian homemade injecting practices that predate the collapse of communism, and alongside regional epidemics of HIV, hepatitis C and tuberculosis, in "Breaking worse: the emergence of krokodil and excessive injuries among people who inject drugs in Eurasia", published in 2013 in the International Journal of Drug Policy, volume 24, pages 265 to 274. Limited availability of opioid substitution treatment is the condition those authors identify as sustaining the practice. The California Poison Control System records the affected age range as 18 to 25.
What Is The Difference Between Krokodil and Tranq?
Krokodil and tranq are chemically unrelated drugs that both destroy skin and soft tissue at injection sites. Krokodil is a homemade codeine-derived opioid mixture, and tranq is xylazine, a veterinary sedative that depresses the central nervous system.
Potency separates the two drugs sharply. Desomorphine runs about 10 times morphine's potency, while the Drug Enforcement Administration's fentanyl fact sheet puts fentanyl at roughly 100 times morphine and 50 times heroin, so krokodil is far weaker than fentanyl. Xylazine is not an opioid, and the Food and Drug Administration warned on November 8, 2022 that naloxone does not reverse xylazine toxicity and that routine toxicology screens do not detect it. That warning names unusual skin necrosis, meaning tissue death, as a sign of xylazine exposure. Xylazine or Tranq appeared in 0.36 percent of overdose deaths across 10 United States jurisdictions in 2015 and 6.7 percent in 2020, according to Friedman J, Montero F, Bourgois P and colleagues in "Xylazine spreads across the US", published in 2022 in Drug and Alcohol Dependence, volume 233, article 109380.
Skin and vein destruction runs further with krokodil. Alves and colleagues documented thrombophlebitis, ulceration, gangrene and necrosis progressing to limb amputation and death among people who inject krokodil, while xylazine produces skin ulceration without that vein and bone loss. Both patterns require wound care alongside substance use disorder treatment.
What Are The Treatments For Krokodil Addiction?
Krokodil addiction is treated as an opioid use disorder complicated by wound, bone and organ damage, so care runs on two tracks at once: stabilizing opioid dependence, and treating the tissue injury the injected mixture has already caused. Medically supervised withdrawal management comes first. Medication for opioid use disorder, including buprenorphine and naltrexone, then stabilizes the dependence, while surgical and infectious-disease care addresses necrotic wounds and bone loss. Long-term rehabilitation programs, individual therapy and psychiatric care follow. Valley Spring Recovery Center provides outpatient levels of care in Norwood, New Jersey, and provides neither detoxification nor inpatient services, so active krokodil-related wounds need a medical facility first.
Where To Get Treatment For Opioid Use Disorder In New Jersey
Valley Spring Recovery Center treats opioid use disorder on an outpatient basis at 830 Broadway, Norwood, New Jersey, through Partial Care, Intensive Outpatient and Outpatient levels of care, with medication for opioid use disorder available through an on-staff psychiatrist. Call (855) 924-5320 to reach admissions.
The Admissions team answers 24/7, covers treatment options, insurance verification and payment routes, then schedules intake.
Frequently Asked Questions About Krokodil
Why Is Krokodil More Addictive Than Morphine?
Krokodil is more addictive than morphine because desomorphine reaches the brain faster and clears faster, so the interval between injections shortens and the number of injections per day climbs. The California Poison Control System attributes desomorphine's increased addictive potential to higher analgesic potency, faster onset of action and shorter half-life acting together. The Drug Enforcement Administration's December 2019 monograph adds that repeated administration of desomorphine at short intervals to patients with severe cancer pain produced a high degree of addiction liability, and that desomorphine abuse carries tolerance, addiction and dependence.
How Long Does A Krokodil High Last?
No primary source publishes a measured duration for a krokodil high. The Drug Enforcement Administration documents a fast onset and brief action for desomorphine, and the California Poison Control System documents a shorter half-life than morphine, which is the extent of the verified record. A 2-hour figure circulates across drug-information sites with no study behind it. Dose variability is the reason one number does not hold: the California Poison Control System records desomorphine content ranging from trace amounts to 75 percent of a krokodil sample, so no two injections deliver the same dose.
What Is The Life Expectancy Of Someone Who Uses Krokodil?
Mean survival after first krokodil use is reported at 2 years, a figure the California Poison Control System publishes. Abscess, thrombophlebitis and gangrene are the complications behind that figure, which Gahr and colleagues recorded across the krokodil literature in 2012. Gahr M, Freudenmann RW, Hiemke C and colleagues published "Desomorphine goes crocodile" in the Journal of Addictive Diseases, volume 31, issue 4, pages 407 to 412.
What Dermatological Condition Can Krokodil Lesions Mimic?
Krokodil lesions resemble pyoderma gangrenosum, an inflammatory ulcerating skin disease, and the California Poison Control System records that krokodil lesions do not respond to the corticosteroid therapy pyoderma gangrenosum responds to. That distinction carries clinical weight, because a wound managed as an autoimmune ulcer while injection continues keeps deteriorating. Mullins and Schwarz named the same problem from the other direction, listing soft tissue infections, heroin contaminants and levamisole as explanations for lesions attributed to krokodil. Wound care and opioid use disorder treatment therefore run together, and admissions at (855) 924-5320 routes a person to the right level of care.