Pharm: ABX Flashcards
Be careful about giving PCN to patients with this disorder…
Epilepsy / neurotoxic
4 methods of PCN resistance
B-lactamase PBP modification (MRSA) Increased efflux (P-glycoprotein) Decrease penetration (porins)
DOC: Syphillis
PCN G Benzathine
DOC: prevention rheumatic fever
PCN G
PO PCN vs. IV PCN
PCN G: IV
PCN V: PO
Which anti-staph PCN is a good choice for patients in renal failure? Why?
Nafcillin (excreted in the bile)
First-line treatment of staph endocarditis in patients without artifical heart valves.
Anti-Staph PCN (MNDO)
AE: Methicillin
IS nephritis (not used clinically)
AE: Nafcillin
Neutropenia
AE: Oxacillin
Hepatitis
Mechanism of MRSA resistance
Altered PBP
Which PCN can/should be taken on a full stomach?
Amoxicillin
Which extended spectrum PCN is associated with C. diff?
Ampicillin
What hypersensitivity-type reaction is caused by the extended spectrum PCN’s? What is the actual reason?
Maculopapular rash
* ABX therapy given for a viral infection
Which PCN are resistant to beta-lactamase?
Anti-staph PCN (MNDO)
DOC: Empiric treatment of infectious endocarditis
PCN (Vanco) + AG (gentamicin)
Which are the anti-pseudomonal PCN’s? Which one is excreted in the bile?
Peperacillin*
Ticarcillin
Carbenicillin
Which extended spectrum PCN is excreted in the bile?
Ampicillin
DOC: endocarditis prophylaxis in dental procedures
Amoxicillin
AE: ticarcillin
Hemeatologic toxicity
Which PCN is used for the treatment of febrile neutropenia?
Anti-pseudomonals
Which beta-lactams are used solely for the treatment of gram negative aerobic infections?
Monobactam (Aztreonam)
What are the AE’s of aztreonam?
Skin rash, elevated transaminase, vertigo, GI
What are the 3 beta-lactamase inhibitors?
Sulbactam (Ampicillin) = Unasyn
Clavulinic acid (Amoxicillin) = Augmentin
Tazobactam (Piperacillin) = Zosyn
DOC: Pseudomonas in CF patient (Think: inhalation)
Aztreonam
Are carbapenems active against MRSA?
No
Which carbapenem must be administered with cilistatin? Why?
Imipenem: metabolized to a nephrotoxic metabolite by a dihyrdroxy-peptidase
AE: imipenem
Seizures, GI, allergy
MOA: Vancomycin. Mode of Resistance?
D-ala – D-ala; prevent cell wall synthesis
R: D-ala – D-lac
AE: Vancomycin
Fever/Chills/Phlebitis
Red man syndrome
Ototoxicity
Nephrotoxicity
Treatment of C. diff
- Metronidazole
- PO Vanco
- Fidaxomicin
Spectrum of usage for Vancomycin: G+ and/or G-
Gram-positive only
PO CS
Cephalexin (1)
Cefaclor (2)
Cefixime (3)
Non-renally excreted CS
Ceftriaxone (3)
Cefoperazone (3)
First generation CS
Cefazolin (surgical prophylaxis)
Cephalexin
Are first generation cephaolosporins resistant to staph penicillinase?
Yes
Which CS is a good PCN G substitute?
1st generation CS
Which CS are similar to Ampicillin/Amoxicillin
2nd generation CS: Cefaclor, cefoxitin, cefotetan, cefamandole