Several minutes after a dentist administered novocaine for local anaesthesia of a patient's tooth, the following symptoms sharply developed in the patient: fatigue, skin itching. Objectively the following can be observed: skin hyperemia, tachycardia, BP dropped down to 70/40 mm Hg. What kind of allergic reaction is this pathology?

Answer options

1. Stimulating
2. Cytotoxic
3. Cell-mediated immune reaction
4. Immune complex
5. Anaphylactic

Explanation

Several minutes after a dentist administered novocaine for local anaesthesia of a patient's tooth, the following symptoms sharply developed in the patient: fatigue, skin itching. Objectively the following can be observed: skin hyperemia, tachycardia, BP dropped down to 70/40 mm Hg. What kind of allergic reaction is this pathology? The patient is allergic to novocaine and this leads to anaphylaxis which is characterized by skin itching, skin hyperemia, tachycardia, and a drop in blood pressure. Note that it took only a few minutes to develop.