Mepivacaina Cloridrato S.A.L.F. (Mepivacaine Hydrochloride)

Mepivacaine Hydrochloride is a local anesthetic used to achieve reversible nerve block in various minor procedures.

• Minor surgical procedures: provides short‑acting anesthesia for incision, excision and other minor operations.
• Dental procedures: enables painless extractions, restorations and other dental work.
• Peripheral nerve block: facilitates regional anesthesia for limb surgeries and diagnostic blocks.

• Mepivacaine Hydrochloride exerts its effect by reversibly binding to voltage‑gated sodium channels on neuronal membranes, stabilizing the inactive state of the channel. This blockade prevents the influx of sodium ions required for depolarization, thereby inhibiting the initiation and propagation of nerve impulses. The result is a rapid, short‑duration loss of sensation in the targeted area without affecting surrounding tissues.

Adverse reactions to mepivacaine are generally related to its local anesthetic properties and systemic absorption.

Common Side Effects

• Tingling or numbness at the injection site.
• Dizziness or light‑headed feeling.
• Headache.
• Nausea or mild vomiting.
• Metallic taste in the mouth.

Serious or Rare Side Effects

• Cardiovascular collapse or severe hypotension.
• Cardiac arrhythmias, including ventricular tachycardia.
• Seizures or convulsions.
• Prolonged or unexpected nerve block.
• Allergic reactions such as rash, urticaria or anaphylaxis.
• Methemoglobinemia (rare).

When using mepivacaine, clinicians should observe specific safety measures to minimize risks.

• Allergy assessment: verify no known hypersensitivity to amide‑type local anesthetics.
• Cardiovascular monitoring: observe heart rate and blood pressure during and after administration.
• Dose limitation: avoid exceeding the recommended maximum dose based on patient weight.
• Pregnancy and lactation: use only when the benefit justifies potential risk to the fetus or infant.
• Elderly or hepatic impairment: adjust dosage and monitor closely for prolonged effects.
• Store at ambient temperature: keep below 25 °C, protect from light and moisture in the original container.

Mepivacaine may interact with other medicines, altering its safety profile or efficacy.

Major Interactions (Avoid)

• Class I antiarrhythmics (e.g., quinidine, procainamide): increase risk of cardiotoxicity.
• Beta‑blockers: may potentiate bradycardia and hypotension.

Moderate Interactions (Monitor Closely)

• MAO inhibitors: can enhance central nervous system effects.
• Tricyclic antidepressants: raise the likelihood of seizures.
• Concurrent use of other local anesthetics: additive toxicity may occur.