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    Metamizole (dipyrone) is a widely used analgesic, but carries a rare risk of agranulocytosis. Early recognition of symptoms is crucial for patient safety.

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    Area of Science:

    • Pharmacology
    • Drug Safety

    Background:

    • Metamizole is a common analgesic in Germany, prescribed extensively.
    • Despite general safety, its use is restricted in some countries due to the rare risk of agranulocytosis.

    Purpose of the Study:

    • To review metamizole's adverse effects, particularly agranulocytosis.
    • To explore its mechanisms of action and drug interactions.

    Main Methods:

    • Narrative review of publications from PubMed and other databases.
    • Focused on metamizole/dipyrone, adverse effects (agranulocytosis), mechanisms, and interactions.

    Main Results:

    • Approximately 44 cases of agranulocytosis reported annually in Germany.
    • Incidences of agranulocytosis vary significantly across European countries.
    • Genetic factors for individual risk prediction are currently unavailable.

    Conclusions:

    • Metamizole offers potent analgesia but has a complex benefit-risk profile.
    • Regulatory status varies globally, reflecting its mixed safety data.
    • Patient education on agranulocytosis symptoms is essential for early detection.