What will happen if penicillin is a administered to a person without checking for sensitivity?

Explanation

Sensitivity test is important before administering penicillin to a person.
(i) Hypersensitivity reaction is a major problem with the use of penicillin resulting in nausea, volmiting, wheezing and ultimately cardiovascular collapse.
(ii) This can be prevented by checking the sensitivity reaction of the patient before administering the antibiotic.