Lidocain/Prilocain Idd (Lidocaine, Prilocaine)

Lidocaine/Prilocaine is a topical local anesthetic used to numb the skin and reduce pain in superficial conditions.

• Minor skin procedures: provides rapid, reversible anesthesia for procedures such as biopsies or laser treatment.
• Superficial wounds: reduces pain associated with cuts, abrasions, or first‑degree burns.
• Dermatologic treatments: facilitates painless removal of skin lesions or application of topical therapies.

• Lidocaine and prilocaine act by reversibly inhibiting voltage‑gated sodium channels in neuronal membranes, which blocks the initiation and propagation of nerve impulses. This interruption of sodium influx prevents depolarization of the nerve fiber, resulting in a temporary loss of sensation in the area where the drug is applied.

Common Side Effects

• Skin irritation or redness at the application site.
• Itching or mild burning sensation.
• Localized swelling or edema.
• Dryness or flaking of the skin.
• Mild headache.
• Transient numbness extending beyond the treated area.

Serious or Rare Side Effects

• Allergic reactions such as urticaria, angioedema, or anaphylaxis.
• Methemoglobinemia, especially with extensive use.
• Systemic toxicity presenting as dizziness, tinnitus, or seizures.
• Severe dermatitis or contact eczema.
• Cardiovascular disturbances like hypotension or arrhythmia.
• Respiratory depression in cases of overdose.

Before using Lidocain/Prilocain Idd, consider the following precautions:

• Allergy assessment: avoid if the patient has known hypersensitivity to amide‑type local anesthetics.
• Skin integrity: apply only to intact, non‑infected skin; do not use on open wounds or mucous membranes.
• Application area: limit the total surface area to the amount recommended by the prescriber to prevent systemic absorption.
• Patient populations: use with caution in infants, the elderly, or patients with hepatic impairment.
• Drug interactions: review concomitant medications that may increase risk of methemoglobinemia or CNS effects.
• Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Lidocain/Prilocain Idd may interact with other substances that affect its safety profile.

Major Interactions (Avoid)

• Concurrent use with other local anesthetics: risk of cumulative toxicity.
• Co‑administration with methemoglobin‑inducing agents (e.g., benzocaine): may increase methemoglobinemia risk.
• Use with systemic central nervous system depressants: potential potentiation of CNS depression.

Moderate Interactions (Monitor Closely)

• CYP2C9 inhibitors (e.g., fluconazole): may reduce lidocaine metabolism.
• Drugs that lower seizure threshold (e.g., tramadol): may increase seizure risk.
• Anticoagulants: may enhance bleeding risk if invasive procedures are performed after application.