Major side effects of bicalutamide[1][2][3][4][5][6][7]
Frequency Class of effect Effect
Very common (≥10%) Reproductive system and breast disorders • Breast tenderness[a]
• Gynecomastia[a]
Common (1–10%) General and psychiatric disorders • Asthenia
• Decreased libido
• Erectile dysfunction
• Hot flashes
Skin and subcutaneous
tissue disorders 		• Decreased body hair
Hepato-biliary disorders • Elevated liver enzymes[b]
Uncommon (0.1–1%) Immune system disorders and hypersensitivity reactions • Angioedema
• Hives
Rare (<0.1%) or unknown Respiratory disorders • Lung disease[c]
Skin and subcutaneous tissue disorders • Sensitivity to light
Hepato-biliary disorders • Liver toxicity[c]
  1. ^ a b May occur as often as 90% of those taking bicalutamide, but is mild-to-moderate in 90% of occurrences. Incidence greatly decreased in combination with castration.
  2. ^ Usually transient, rarely severe. Resolves or improves with continued therapy or on discontinuation.
  3. ^ a b Reported in single cases, but not observed in any large, randomized trial. With regular liver monitoring and discontinuation as needed.
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