Wk 2 Cephalosporins Flashcards
Cephalosporins are similar in structure to
penicillins
What is the MOA of cephalosporins?
Inhibit cell wall synthesis through the same penicillin binding protein and activate autolysis
Cephalosporins are often resistant to __-__
beta-lactamase
Cephalosporins are low __
toxicity
You should avoid cephalosporins if that patient has an __ penicillin allergy
anaphylactic
How many generations of cephalosporins are there?
5
Cephalosporins are safe for __ and are considered category B
Pregnancy
Cephalosporins have a __-__ with penicillin
Cross-sensitivity
What type of bacteria do cephalosporins not work against?
Enterococcus
1st generation cephalosporins have more action again gram-__ bacteria
positive
What generation of cephalosporins has the greatest action against gram-negative bacteria?
5th
What type of bacteria is more difficult to treat?
gram-negative
What are the 6 most common adverse effects of all cephalosporins?
Mild diarrhea Abdominal cramps Rash Pruritus Redness Edema
Cephalosporins have the same indications as __
penicillins
Cephalosporins have poor __ absorption
oral
How many types of cephalosporins are there?
18
How many cephalosporins are available PO?
10
What are the two 1st generation cephalosporins?
cefazolin and cephalexin
What is the trade name of cephalexin?
Keflex
What is the trade name of cefazolin?
Kefzol/Ancef
1st generation cephalosporins work well on what type of bacteria?
Gram-positive
What type of infections do 1st generation cephalosporins work on?
Staph and non-enterococcal strep infections
What routes are cefazolin administered?
IV only
What routes are cephalexin administered?
PO and IV
Cephalexin is commonly given in what setting and for what?
Outpatient for skin infections and UTIs
Which 1st generation cephalosporin is commonly given for surgical prophylaxis?
cefazolin
1st generation cephalosporins are not given for what type of infection?
CNS infections because they cannot penetrate the blood brain barrier or CSF
What are the 2nd generation cephalosporins? (2)
Cefuroxime and cefotetan
2nd generation cephalosporins cover what types of bacteria?
All the gram-positive of the first generation and some gram-negative
Cefotetan works on __ bacteria, including __ bacteria
intestinal, anaerobic
2nd generation cephalosporins have minimal penetration on the __ __ __
blood brain barrier
2nd generation cephalosporins do not work on __
Pseudomonas
Cefuroxime does not kill __ bacteria
anaerobic
What are three 3rd generation cephalosporins?
Ceftriaxone
Ceftazidime
Cefotaxine
What is the most potent against gram negative bacteria?
3rd generation
3rd generation cephalosporins do not work against what type of bacteria?
Gram-positive
What routes are 3rd generation cephalosporins given?
IV and IM only, only certain ones are given PO
What 3rd generation cephalosporin can be given once per day?
ceftriaxone because it is extremely long acting
Which 3rd generation cephalosporin is able to cross the blood brain barrier?
ceftriaxone
Ceftriaxone is effective in treating CNS infections, including __
meningitis
You shouldn’t give ceftriaxone to patients with…?
liver failure
Which 3rd generation cephalosporin works well on pseudomonas?
ceftrazadime
What is the 4th generation cephalosporin?
cefepime
What types of bacteria does cefepime work on?
Both gram-negative and gram-positive
Cefepime can also do what?
Cross the blood brain barrier
What types of infections can cefepime treat?
UTIs, skin infections and pseudomonas
What drug is a 5th generation cephalosporin?
Ceftaroline
What special organisms does ceftaroline work against?
MRSA, MSSA, some VRSA/VISA
What organisms does ceftaroline NOT work against?
Enterobacter, pseudomonas, ESBL, klebsiella
What is ESBL?
extended-spectrum beta lactamase
What is MSSA?
methicillin susceptible staph aureus
What is VRSA?
Vancomycin resistant staph aureus
What is VISA?
Vancomycin intermediate staph aureus
What organ do you need to monitor the function of if a patient is on ceftaroline?
Kidneys
What route is ceftaroline given?
IV
What is the newest cephalosporin?
Ceftolozane/tazobactam (zerbaxa)
Zerbaxa is a cephalosporin combine with…
beta lactamase inhibitor