Phase I study of ethylbis(2,2-dimethyl-1-aziridinyl) phosphinate (AB-163).

Ethylbis(2,2-dimethyl-1-aziridinyl)phosphinate (AB-163) was used to treat 27 patients in a phase I trial. The limiting toxicity on a weekly schedule of IV administration involved nausea and vomiting associated with a variety of cholinergic side effects, including possible seizures. A starting dose of 300--400 mg/M2/week is suggested for a Phase II trial. One partial response in a patient with squamous-cell carcinoma of the cervix metastatic to the lungs was seen.