A 22 year old male present to the ED with complaints of generalized flushing of the skin and associated urticaria which began within 20 minutes after he began eating at a new Sushi restaurant. Upon arrival he is diaphoretic, nauseated and dizzy with tingling to his lips and tongue.
Temp: 99.4°F (37.4°C), HR: 132, RR: 22, BP: 88/57, Sat. 98% on room air.
1. What is the cause of this reaction ?
2. What is the treatment ?