Mepivacaína B. Braun (Mepivacaine Hydrochloride)

Mepivacaine is used in clinical settings to achieve local anesthesia through various administration routes.

• Epidural anesthesia: produces a dense block of sensation for obstetric or lower‑body surgeries.
• Intradermal anesthesia: provides rapid, superficial numbness for minor skin procedures and diagnostic testing.
• Perineural anesthesia: creates targeted nerve block to facilitate orthopedic or dental surgeries.

• Mepivacaine blocks voltage‑gated sodium channels on neuronal membranes, preventing the influx of sodium ions required for depolarization. This inhibition stops the initiation and propagation of nerve impulses, resulting in a reversible loss of sensory and motor function in the area where the drug is administered.

Mepivacaine may cause a range of adverse reactions, most of which are dose‑related and transient.

Common Side Effects

• Mild hypotension: temporary drop in blood pressure after injection.
• Dizziness or light‑headedness: sensation of unsteadiness during onset.
• Nausea or vomiting: gastrointestinal upset in some patients.
• Transient metallic taste: brief alteration in taste perception.
• Injection site pain or burning: local discomfort at the puncture site.
• Tingling or numbness beyond the intended area: mild paresthesia.

Serious or Rare Side Effects

• Cardiovascular collapse: severe drop in heart function requiring emergency care.
• Anaphylaxis: life‑threatening allergic reaction with rash, swelling, and airway compromise.
• Seizures: central nervous system excitation in overdose situations.
• Prolonged nerve block: extended loss of motor function beyond expected duration.
• Methemoglobinemia: abnormal hemoglobin causing reduced oxygen delivery.
• Cardiac arrhythmia: irregular heart rhythm potentially leading to hemodynamic instability.

When using Mepivacaína B. Braun, clinicians should observe several safety measures.

• Patient assessment: evaluate cardiovascular and hepatic status before administration.
• Dose adjustment: reduce dose in patients with impaired liver function.
• Allergy screening: avoid use in individuals with known hypersensitivity to amide‑type anesthetics.
• Cardiovascular monitoring: observe heart rate and blood pressure during and after injection.
• Concomitant anesthetics: limit simultaneous use of other local anesthetics to prevent toxicity.
• Store at ambient temperature: keep in original packaging, protect from moisture and direct light.

Mepivacaine can interact with other drugs, altering its safety profile.

Major Interactions (Avoid)

• Class I antiarrhythmics (e.g., quinidine, procainamide): increase risk of cardiac toxicity.
• High‑dose epinephrine: may exacerbate cardiovascular effects.
• Other amide local anesthetics: additive neuro‑ and cardiotoxicity.

Moderate Interactions (Monitor Closely)

• CYP3A4 inhibitors (e.g., erythromycin, ketoconazole): may raise plasma levels.
• Beta‑blockers: enhance bradycardia and hypotension.
• Diuretics: potentiate hypotensive response.