Pharmakokinetics of Mistletoe Lectins after Intravenous Application of a Mistletoe Product in Healthy Subjects.

Mistletoe lectins (ML) have cytotoxic and immunomodulating properties, and subcutaneously applied mistletoe products (MP) containing ML have approval for supportive cancer treatment. MP are also given off-label intravenously, but data about pharmacokinetics are widely lacking. Therefore, the aim of our phase I trial was to evaluate the pharmacokinetics and safety of intravenously applied natural ML.