Le30-32.Antibiotic Drugs 1

Question 1

What is the target organisms for narrow spectrum penicillins V and G?

Answer 1

Gram Positive bacteria. Makes sense bc penicillins target cell walls and only gram + bacteria have them.

Question 2

Why are narrow favored antibiotics such as penicillin V favored over broader spectrum antibiotics such as ampicillin & amoxicillin?

Answer 2

B/c broad spectrum penicillins have more GI complaints, diarrhea, & superinfections such as candida & pseudomembranous colitis from C. dificile

Question 3

When are the broadest spectrum penicillins (such as carbenicillin & ticarcillin) used?

Answer 3

For serious, life threatening gram(-) septicemias

Question 4

What are the penicillins methicillin and oxacillin used for?

Answer 4

Methicillin and oxacillins are penicillinase resistant penicillins. They resist breakdown by B-lactamase.