Immediately after eating, a man develops swelling of face and lips, respiratory distress, intense pruiritis, hypotension and feeling of impending doom. The most likely diagnosis is –

This patient has :- Swelling of face & lip    → can occur in both anaphylaxis or locally as angioneurotic edema. Respiratory distress → can occur in both anaphylaxis or angioneurotic edema. Intense pruritis    → Occurs in anaphylaxis but not in angioneurotic edema. Hypotension  → Occurs in anaphylaxis but not in angioneurotic edema. So, the diagnosis is anaphylaxis.