Injectio Procainii Chlorati Ardeapharma (Procaine Hydrochloride)

Procaine Hydrochloride is a local anesthetic used to achieve reversible nerve block in various clinical settings.

• Minor surgical procedures: produces temporary loss of sensation to facilitate incision and suturing.
• Dental procedures: enables painless tooth extractions, restorations and periodontal work.
• Diagnostic procedures: provides patient comfort during biopsies, endoscopies and other minimally invasive examinations.

• Procaine Hydrochloride exerts its effect by reversibly binding to voltage‑gated sodium channels on neuronal membranes. This blockade prevents the influx of sodium ions during depolarization, thereby inhibiting the initiation and propagation of nerve impulses. The resulting interruption of signal transmission produces a localized, temporary loss of sensation without affecting surrounding tissues.

Procaine Hydrochloride may cause a range of adverse reactions, most of which are mild and transient.

Common Side Effects

• Injection site pain or irritation.
• Redness or swelling at the administration site.
• Mild dizziness or light‑headedness.
• Nausea or transient gastrointestinal discomfort.
• Transient visual disturbances.

Serious or Rare Side Effects

• Allergic reactions such as urticaria, bronchospasm, or anaphylaxis.
• Cardiovascular effects including hypotension, arrhythmias, or cardiac arrest.
• Central nervous system toxicity presenting as seizures or convulsions.
• Methemoglobinemia, a rare blood disorder.
• Persistent numbness or prolonged motor block beyond the expected duration.

When using Procaine Hydrochloride, clinicians should consider several safety measures.

• Allergy assessment: verify no known hypersensitivity to amide‑type local anesthetics.
• Cardiovascular monitoring: observe patients with pre‑existing heart disease for hypotension or arrhythmias.
• Dosage caution: avoid exceeding recommended volumes to reduce systemic toxicity risk.
• Pregnancy and lactation: use only if the potential benefit justifies potential risk, as safety data are limited.
• Storage: Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Procaine Hydrochloride can interact with other agents that affect the cardiovascular or nervous systems.

Major Interactions (Avoid)

• Class I anti‑arrhythmic drugs (e.g., quinidine, procainamide) – may potentiate cardiac conduction disturbances.
• Monoamine oxidase inhibitors – increase risk of hypertensive crisis when combined with vasoconstrictors.

Moderate Interactions (Monitor Closely)

• Beta‑blockers – may enhance bradycardia or hypotension.
• CNS depressants (e.g., benzodiazepines, opioids) – may augment sedation or respiratory depression.
• Other local anesthetics – cumulative toxicity risk if administered concurrently.