Levamisole

Levamisole is a cutting agent often used for cocaine. It has significant health risks compared to other cutting agents. Its a cutting agent that you really don't want to have in your cocaine.

Potential complications associated with use of levamisole-laced cocaine include:

• Skin necrosis.
• Neutropenia: a condition in which the number of white blood cells in the bloodstream is decreased.
  
• Agranulocytosis: an acute condition involving a severe and dangerous leukopenia (lowered white blood cell count), most commonly of neutrophils causing a neutropenia in the circulating blood. It is a severe lack of one major class of infection-fighting white blood cells.
  
• Arthralgias: inflammatory joint pain.
  
• Retiform purpura: Purpura are nonblanchable, hemorrhagic skin lesions that result from the leakage of red blood cells into the skin.

The incidence of hospitalizations related to use of levamisole-contaminated cocaine continues to increase and clinicians should be aware of the more common clinical manifestations.

To test for the presence of Levamisole you can use a reagent test kit. And overview of such test kits can be found here.