Can one have diminished breathe sounds during an anaphlaxic esposide

Answer 1

In an allergic reaction, or severe asthma, yes. Serious asthma could have diminished breath sounds and dyspnea. It's dangerous. An inhaler is needed ASAP.

Answer 2

Yes, the diminished breath sounds indicate airway being blocked, which is typical in anaphylaxis. 

Anaphylaxis requires an injection of epinephrine and a follow-up trip to an emergency room. If you don't have epinephrine, you need to go to an emergency room immediately. If anaphylaxis isn't treated right away, it can be fatal.