Indications for Monotherapy
In its pure form (as a single-ingredient drug), metamizole sodium is used primarily to treat pain of inflammatory origin or associated with functional disorders.
Main clinical situations where the drug is indicated:
- Inflammatory pain: This includes muscle tissue damage (myalgia), nerve trunk pain (neuralgia), and joint pain (arthralgia).
- Headache of varying intensity.
- Dysmenorrhea: Severe pain accompanying the menstrual cycle.
_Metamizole sodium_ offers flexible routes of administration: it can be prescribed both enterally (oral tablets) and parenterally (injections), depending on how rapidly the analgesic effect is needed.
Combination Forms: Synergy with Antispasmodics
Combination drugs based on metamizole sodium (commonly known by brand names such as Baralgin or Spasmalgon) deserve special attention.
In addition to the analgesic itself, their composition includes antispasmodic components:
- Pitofenone.
- Fenpiverinium bromide.
The goal of this combination is not only to block pain perception but also to eliminate its root cause: smooth muscle spasm of internal organs.
These drugs have strict, specific indications. They are the drug of choice for relieving acute conditions—renal, biliary, and intestinal colic. To ensure the fastest possible smooth muscle relaxation and patient relief during colic, these combinations are administered exclusively parenterally (intravenously or intramuscularly).
Safety Profile and Strict Limitations
Despite its high efficacy, metamizole sodium carries a significant toxicity profile that physicians must keep in mind when prescribing therapy. The primary danger lies in the drug's effect on the hematopoietic system.
- Suppression of hematopoiesis: With systematic and prolonged use, the risk of bone marrow suppression increases dramatically.
- Hematological complications: The main and most severe adverse effects are leukopenia (decreased white blood cell count) and the development of agranulocytosis (a critical drop in granulocyte levels, leaving the body defenseless against infections).
Dosing Regimen: Due to the fatal risks to the hematopoietic system described above, the use of metamizole sodium is strictly time-limited. The drug is categorically not recommended for long-term courses and should be used only as short-term rescue medication.