Answer
The most frequently reported breast-related side effects of flutamide monotherapy are gynaecomastia (breast enlargement) and/or breast tenderness, sometimes accompanied by galactorrhoea (milk discharge).
Sources for this answer
- Flutamide 250 mg TabletsViatris (formerly Mylan or Upjohn) · emc · SmPC §4.8 Undesirable effects · Version 3Document updated
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