Enzalutamide is a prescription medicine approved for men having prostate cancer. It is used as oral tablets of strength 40mg. This medication is given to patients diagnosed with castrate-resistant prostate cancer. It helps in managing tumors that don’t respond to hormone therapies. The known negative effects of enzalutamide tablets include back pain, fatigue, and constipation. Fulvestrant is an approved medicine for breast cancer in women. It is available as 250mg/5ml injections and sold under the brand name Fulvant. This medication is prescribed to treat patients diagnosed with hormone receptor-positive breast cancer that has spread to nearby organs. The common side effects of fulvestrant injection 250mg include difficulty in breathing, chest pain, cloudy urine, etc.