A phase II study of high-dose medroxyprogesterone acetate in advanced breast cancer.
Twenty-three evaluable patients with advanced breast cancer were treated with MPA, 1,400 mg/m2 daily PO for the first 6 months, and 500 mg/m2 daily PO thereafter. The median total dose was 191,400 mg in 88 days, with the maximum dose given to date 522,600 mg in 282 days. Most patients tolerated high-dose MPA well. Side-effects were minimal and reversible. The commonest side-effects were tremor or edema. The CR plus PR rate was five of 23 (22%). All responding patients were over 50 years of age and had a good performance status. Hormone receptor status was known in four patients only, so that no correlation between receptor status and response could be drawn. MPA appears to be a useful hormone for use in the management of breast cancer. Optimal dosage remains to be determined.
D000328:Adult; D000970:Antineoplastic Agents; D001943:Breast Neoplasms / Q000188:drug therapy*; D004341:Drug Evaluation; D005260:Female; D006801:Humans; D008525:Medroxyprogesterone / Q000031:analogs & derivatives* / Q000627:therapeutic use; D017258:Medroxyprogesterone Acetate; D008875:Middle Aged
D000970:Antineoplastic Agents; D017258:Medroxyprogesterone Acetate; D008525:Medroxyprogesterone