A 35-year-old woman with a history of multiple fibroadenomas presents with severe cyclical mastalgia and nodularity. She has failed conservative measures (caffeine restriction, supportive bra). What is the drug of choice for her mastalgia?

Explanation

## Pharmacological Management of Severe Cyclical Mastalgia **Key Point:** Danazol is the most effective pharmacological agent for severe, refractory cyclical mastalgia, with response rates of 60–80%. ### Why Danazol is First-Line for Severe Mastalgia **High-Yield:** Danazol's mechanism in mastalgia: - Suppresses FSH and LH, reducing estrogen and progesterone fluctuations - Reduces breast tissue sensitivity to hormonal changes - Effective in both cyclical and non-cyclical mastalgia - Typical dose: 100–200 mg daily for 3–6 months **Clinical Pearl:** Danazol is reserved for severe, refractory cases because of side effects (virilization, hepatotoxicity, lipid changes). It is NOT first-line for mild mastalgia. ### Treatment Algorithm for Mastalgia ```mermaid flowchart TD A[Mastalgia]:::outcome --> B{Severity and response to conservative measures?}:::decision B -->|Mild/Moderate| C[Supportive bra, caffeine restriction, NSAIDs]:::action B -->|Severe, refractory| D[Danazol 100-200 mg daily]:::action C --> E{Improvement?}:::decision E -->|Yes| F[Continue conservative measures]:::action E -->|No| D D --> G[Reassess at 3-6 months]:::action ``` ### Comparison of Pharmacological Options for Mastalgia | Agent | Mechanism | Efficacy | Side Effects | Role | |-------|-----------|----------|--------------|------| | **Danazol** | Androgen; suppresses FSH/LH | 60–80% (best) | Virilization, hepatotoxicity, lipid changes | **First-line for severe refractory mastalgia** | | Tamoxifen | Estrogen antagonist | 50–70% | Thromboembolism, hot flushes, endometrial cancer risk | Second-line; reserved for post-menopausal or high-risk patients | | NSAIDs (Ibuprofen) | COX inhibition | 30–40% (mild) | GI upset, renal effects | First-line for mild mastalgia | | OCPs | Hormonal suppression | Variable; may worsen in some | Thromboembolism, nausea | Not first-line; may help if mastalgia is linked to cycle | **Warning:** Danazol is teratogenic; pregnancy must be excluded and contraception used during therapy. **Mnemonic:** **DANAZOL for SEVERE mastalgia** — **D**anazol = **D**ramatic response in refractory cases.