Which problem is a sign or symptom of an allergic or anaphylactic response to an antibacterial drug?

Question

Quizplus · Accepted Answer

Most antibacterial drugs induce diarrhea when taken for a week or longer because they kill off so many of the normal bacteria in the intestinal tract.This is not an allergy and the immune system is taking no part in causing the diarrhea.Hair loss is not a common side effect of antibacterial therapy nor is it an allergic reaction.When a true systemic allergic reaction occurs,it is usually accompanied by low blood pressure because of widespread blood vessel dilation.This blood vessel dilation of a true allergic response often causes swelling of the face,lips,and tongue.

Which Problem Is a Sign or Symptom of an Allergic