Procaine test

An intradermal test is required before procaine injection to prevent allergic reactions during injection. An intradermal test is required before procaine injection to prevent allergic reactions during injection. Positive: local skin redness (hard liver greater than 1cm) occurs within 15-30 minutes after injection; skin rash, itching, dermatitis, combined meningitis, stomatitis, laryngeal edema, nausea, dizziness, palpitations and even blood pressure drop, in severe cases Irritability, pale complexion, sweating, coma, cyanosis, dyspnea, and even death from convulsions.