The Anticancer Effects and Proper Use of Mylabris (Banmao)

Mylabris (Banmao, the dried body of blister beetles such as Mylabris phalerata Pallas or Mylabris cichorii Linnaeus) is a pungent, hot, highly toxic Chinese herb that enters the liver, stomach, and large intestine channels. In TCM it has been used to break blood, disperse stasis, eliminate masses, and attack toxin. Modern pharmacological research has confirmed that cantharidin, the active compound in Mylabris, has inhibitory effects on a variety of tumor cell lines.

Clinically, preparations derived from Mylabris—such as methylcantharidin sodium sulfonate and the refined cantharidin preparations—have been used in China as adjuvant therapy for primary liver cancer, esophageal cancer, and some other solid tumors. Some small studies suggest they may improve appetite, relieve pain, and prolong survival when used together with chemotherapy or after surgery. However, the evidence is not strong; Mylabris-derived drugs are not standard first-line treatment for any cancer.

The toxicity of Mylabris must be emphasized. Cantharidin is a severe irritant: even dermal contact can cause blisters; oral overdose causes inflammation and necrosis of the gastrointestinal tract, kidney injury, and in severe cases death. The traditional dose of raw Mylabris is very small, and the herb is usually processed before use. Raw Mylabris must never be self-medicated at home.

Patients considering Mylabris-derived anticancer therapy should: (1) be under the care of a licensed oncologist or TCM physician experienced in its use; (2) have regular liver and kidney function and urine tests; (3) avoid combining it with other nephrotoxic drugs; (4) stop immediately and seek medical care if there is burning pain when urinating, blood in urine, or severe stomach pain.

Mylabris is a double-edged herb: it has real anticancer potential, but its toxicity is serious. It should be used only by professionals, never as a folk remedy.