How do you identify levamisole?
Skin pathology. Another distinguishing finding of levamisole-adulterated cocaine-induced pathology is characteristic skin lesions, which often involve the ear lobes and the skin overlying the zygomatic arch [24].
What is a vascular rash?
The word “vasculitis” relates to blood vessel inflammation and damage. This inflammation and damage causes palpable purpura, the main sign of vasculitis. These spots may appear purple or red. You’ll most likely find them on your legs, buttocks, and torso. You might also develop blisters or hives on your skin.
Is levamisole harmful to humans?
“Levamisole can be highly toxic in humans, but unless you’re specifically looking for it in a urine sample, you won’t know it’s there. Physicians who treat cocaine users need to be aware of this because most users probably wouldn’t care, even if they knew the drug was contaminated with levamisole.”
How is levamisole metabolized?
Levamisole is rapidly absorbed from the GI tract and extensively metabolized in the liver and excreted mainly by the kidneys (70% over 3 days). Its plasma elimination half-life is 3- 4 hours. Due to short elimination half-life, blood levels of levamisole fall more rapidly and go unnoticed in toxicological examination.
Is levamisole toxic?
Levamisole is very toxic, and clinical signs of this toxicity can range from a mild skin rash to extensive cutaneous necrosis, immunologic conditions such as glomerulonephritis, and severe neutropenia or agranulocytosis.
What causes vasculitis in legs?
Possible triggers for this immune system reaction include: Infections, such as hepatitis B and hepatitis C. Blood cancers. Immune system diseases, such as rheumatoid arthritis, lupus and scleroderma.
Can humans take levamisole?
Levamisole is an antihelminthic drug approved for use in veterinary medicine in the United States. Previously, it was used in human medicine as an immunomodulator in rheumatoid arthritis and colorectal cancer therapy. It is no longer available for human use in the United States.
How common is levamisole?
1). By contrast, in October 2017, the DEA reported that 87% of the seized and analyzed cocaine bricks contained levamisole. Thus, levamisole is currently the most common cocaine adulterant in Europe and North America3,4.
What does vasculitis of skin look like?
Common vasculitis skin lesions are: red or purple dots (petechiae), usually most numerous on the legs. larger spots, about the size of the end of a finger (purpura), some of which look like large bruises. Less common vasculitis lesions are hives, an itchy lumpy rash and painful or tender lumps.
Where does vasculitis rash occur?
These skin lesions may be flat and red (macules), nodules or more substantial hemorrhages under the skin (purpura). They may occur on many areas of the body but are seen most often on the back, hands, buttocks, the inside areas of the forearm and the lower extremities.
What is levamisole-induced vasculitis?
Levamisole-induced vasculitis was first described in the 1970s. This syndrome produces a characteristic clinical pres-entation of vasculitis in association with a variable pattern of immunologic disturbances.
What is levamisole adulterated cocaine vasculopathy?
Levamisole-adulterated cocaine vasculopathy is exclusively reported in cocaine users, more often with chronic use and in those smoking and snorting contaminated cocaine [6,7]. It can also occur when cocaine is injected. The average age of patients at presentation is 44 years old [1].
Which biopsy findings are characteristic of levamisole-induced vasculitis?
In levamisole-induced vasculitis, biopsy specimens may demonstrate necrosis and inflammation of vessel walls, with red blood cell extravasation, karyorrhexis, and fibrin microthrombi within small vessels in the superficial and deep dermis.
What is the pathophysiology of levamisole-induced autoimmunity?
The pathophysiology of levamisole-induced autoimmunity is incompletely characterized. Recent work suggests that levamisole promotes neutrophils to undergo a specific type of cell death characterized by extrusion of granule proteins bound to chromatin and other nuclear materials.