Antibiotics, Antimicrobials, Anti-fungals, Anti-virals Flashcards
Sulfonamides MOA
Inhibit synthesis of tetrahydrofolic acid
Sulfonamide: bacteriostatic or bactericidal
bacteriostatic
Sulfonamides meds
Sulfamethoxazole
Trimethoprim
Sulfonamides uses
UTIs - E.coli
GI infections
Pneumonia - Pneumocystis carinii
MRSA
Sulfonamides side effects
Hypersensitivity reactions
- Photosensitivity
- Stevens-Johnson syndrome
Hematologic: thrombocytopenia
Renal damage
Allergies: itching/rash
Sulfonamides Pertinent Teachings
- Can intensify effects from warfarin and dilantin
- decrease sun exposure/wear sunblock
- increase water to prevent kidney damage
- monitor BS in DM patients
- Do not give to pregnant/nursing women or infants <2 months
Metronidazole MOA
inhibits bacterial DNA gyrase
Metronidazole Uses
CDI, H.Pylori, Trichomoniasis, Gardnerella vaginalis, CNS/bone/skin/soft tissue infections
Metronidazole Side Effects
Neurotoxicity, hepatotoxicity, metallic taste, urine discoloration
Metronidazole Pertinent Teachings
Avoid alcohol - Disulfiram like reactions
Fluoroquinolones MOA
Inhibits synthesis of DNA/RNA
Fluoroquinolones meds
ciprofloxacin, levofloxacin
Fluoroquinolones Uses
Respiratory tract infections, GI infections, UTI, Bone/skin/joint/soft tissue infections
Fluoroquinolones Side Effects
Tendon rupture, muscle weakness, photosensitivity, GI (n/v/d), headaches/dizziness, risk of CDI
Fluoroquinolones Pertinent Teachings
- Contraindication to myasthenia gravis
- Risk: elderly, transplants, glucocorticoids
- Avoid milk + antacids + cationic compounds
Aminoglycosides MOA
Inhibit protein synthesis
Aminoglycosides: bactericidal or bacteriostatic?
Bactericidal
Aminoglycosides Use
Serious Gram (-) only: - enterobacteriaceae, P. aeruginosa
- VRE (+PCN)
- GI, urinary, respiratory, bone, skin infections
Aminoglycosides meds
Gentamicin
Aminoglycosides Side Effects
Ototoxicity, nephrotoxicity
Aminoglycosides Pertinent Teachings
- Never mix with PCN in same IV
- Monitor peaks and troughs
- Daily IV preferred - decrease ototoxicity
Clindamycin MOA
Inhibits protein synthesis
Clindamycin class
Lincosomide
Clindamycin Use
Alternative to PCN, only anaerobic infections outside of CNS, MRSA
Clindamycin Side Effects
Can cause CDAD
Allergies: hypersensitivity, rash
Clindamycin Pertinent Teachings
Monitor liver function, educate on CDAD
Oxizolidinones MOA
Inhibits protein synthesis
Oxizolidinones bacteriostatic or bactericidal?
bacteriostatic
Linezolid Use
MRSA, VRE, healthcare/community associated pneumonia, skin infections
Linezolid Side Effects
diarrhea, nausea, headaches, myelosuppression
Linezolid Pertinent Teachings
Monitor blood count
Don’t take with tyramine, SSRIs, MAO inhibitors
Macrolides: bacteriostatic or bactericidal
bacteriostatic
Macrolides MOA
inhibit protein synthesis
Macrolides meds
Erythromycin
Azithromycin
Clarithromycin
Macrolides Uses
Respiratory tract infections
- pneumonia, sinus
skin infections
- chlamydia, ear
Alternative to PCN
Macrolides side effects
GI distress, QT prolongation, hepatotoxicity
Macrolides Pertinent Teachings
- Avoid antacids + antidysrhythmic drugs
- Administer w/food to avoid GI
- Can increase half-lives of drugs
Tetracycline bacteriostatic or bactericidal?
bacteriostatic
Tetracycline meds
doxycyline, minocyline
Tetracycline MOA
inhibits protein synthesis
Tetracycline Uses
Chlamydia, rickettsia, H.pylori, Lyme disease, peridontal disease, acne, MRSA
Tetracycline side effects
Teeth discoloration, suppress bone growth, GI distress, superinfection (CDI), photosensitivity, nephrotoxicity, hepatotoxicity
Tetracycline pertinent teachings
- Teratogenic (<8y/o + moms)
- Do not give with calcium or antacids
- protect against sun
- Do not give to pt. with renal disease
Vancomycin bacteriostatic or bactericidal?
bactericidal
Vancomycin MOA
Weakens bacterial wall
Vancomycin uses
reserve for SEVERE infections
CDI, MRSA, alternative to PCN
Vancomycin side effects
Ototoxicity
Nephrotoxicity
Red person syndrome
Thrombophlebitis
Vancomycin pertinent teachings
- infuse slowly
- narrow range of 10-20mcg/mL
- monitor kidneys and liver
- PO with food/refridgerate
Cephalosporins bacteriostatic or bactericidal?
bactericidal
Cephalosporins MOA
weakens bacterial cell wall
Cephalosporin generations
increase activity to (-) bacteria, resistance to beta-lactamases, and ability to reach CSF with each new generation
Cephalosporin uses
3rd gen: meningitis
5th gen: MRSA
other: skin, urinary, respiratory, etc.
Cephalosporin Side effects
CEF THE GIANT
- Gi
- increase glucose
- anaphylaxis/alcohol
- nephrotoxicity
- thrombocytopenia
Cephalosporin pertinent teachings
- ceftriaxone contraindicated for neonates IV
- caution with renal disease
- cross sensitivity with PCN
- avoid bleeding by rotating IV sites
Metronidazole bacteriostatic or bactericidal?
bactericidal
Mild to moderate CDI preferred drug
metronidazole
Severe CDI preferred drug
Vancomycin
Which drugs can treat MRSA?
5th gen cephalosporin, vancomycin, tetracyclines, linezolid, sulfonamides, rifampin
Which drugs can treat VRE?
Linezolid, combination of PCN and gentamicin
Alternatives to PCN
vancomycin, clindamycin, macrolides
PCN bacteriostatic or bactericidal?
bactericidal
PCN MOA
weakens cell wall
PCN categories
Narrow spectrum (sensitive) - PCN G/V
Narrow spectrum (resistant) - nafcillin
Broad spectrum - ampicillin/amoxicillin
Extended spectrum: piperacillin
PCN side effects
GI distress, anaphylaxis, rash, itching, hives
Broad-spectrum: rash/diarrhea
PCN pertinent teachings
- Contraindicated for hx of severe allergy
- possible cross-allergy
- keep epi/resp support nearby
- take oral PCN with water 1 hr before or 2 hr after meals
- PO/IM
PCN uses
skin, ear, urinary, STIs, pneumonia, meningitis infections
Isoniazid MOA
inhibits synthesis of mycolic acid in cell wall
Isoniazid Use
Active TB, LTBI, prophylaxis
Isoniazid side effects
Peripheral neuropathy, hepatotoxicity, anemia, optic neuritis
Isoniazid pertinent teachings
- Contraindicated w/liver disease
- Increase vitamin B6
Rifampin MOA
destroys TB microbe DNA/RNA
Rifampin Use
TB, leprosy, MRSA
Rifampin side effects
Hepatotoxicity, red/orange body fluids, GI distress
Rifampin pertinent teachings
- decrease efficacy of oral contraceptives
- increase metabolism
- take on empty stomach
Pyraminizide MOA
inhibits fatty acid synthesis/decreases growth of mycobacterium
Pyraminizide Side effects
Hyperuricemia, Hepatotoxicity, GI distress
Pyriminizide pertinent teachings
- Test every 2 weeks or every month
- Contraindicated for liver disease
Ethambutol MOA
inhibits arabinosyltransferase, impairs cell wall
Ethambutol side effects
optic neuritis, hyperuricemia, allergies (itching), NO hepatotoxicity
Ethambutol pertinent teachings
Contraindicated w/optic neuritis
Ethambutol use
TB and resistant TB
Pyraminizide Use
TB
Amphotericin B MOA
increases cell permeability
Amphotericin B Use
most serious systemic mycoses and superficial fungal infections
Amphotericin B side effects
hypomagnesemia, hypokalemia, infusion reactions (nausea, fever, chills, headaches), nephrotoxicity, highly toxic
Amphotericin B pertinent teachings
- IV only
- rotate IV site
- infuse slowly
- treat infusion reactions with acetaminophen and diphenhydramine
- monitor urine output and give 1000mL of normal saline the day of meds
Itraconazole/Fluconazole MOA
inhibits fungal cytochrome
Itraconazole/fluconazole Use
systemic mycosis, candidiasis, tinea, alt/ampho-b, superficial fungal infections
Itraconazole/fluconazole side effects
GI distress, headaches, hepatotoxicity, cardio suppression (decreased HR)
Itraconazole/fluconazole pertinent teachings
Contraindicated for pimozide, quinidine, dofetilide, cisapride
- cause dysrhythmias
AZT/Zidovudine MOA
inhibits synthesis of DNA by causing premature termination of DNA strand growth
AZT/Zidovudine Use
HIV/AIDS
AZT/Zidovudine side effects
severe anemia, neutropenia, hepatomegaly, lactic acidosis
AZT/Zidovudine pertinent teachings
monitor CBC and liver
Lopinavir/ritonavir, fosamprenavir MOA
cleaves bonds in polyprotein and the virus remains immature and noninfectious
Lopinavir/ritonavir, fosamprenavir type
protease inhibitors
Lopinavir/ritonavir, fosamprenavir use
HIV/AIDS
Lopinavir/ritonavir, fosamprenavir side effects
Hyperlipidemia, hyperglycemia, lipodystrophy, GI, prolongation of PR and QT intervals
Lopinavir/ritonavir, fosamprenavir implications
- Take at night on empty stomach
- Increased risk for dysrhthmias
- High fat meals can increase toxicity
Fosamprenavir special implication
do not give to pt. with sulfonamide sensativity
Efavirenz MOA
binds to active center of reverse transcripterase to cause direct inhibition
Efavirenz type
NNRTIs
Efavirenz use
HIV/AIDS
Efavirenz side effects
Derm-rash, insomnia, depression, teratogenic
Efavirenz implications
- do not give to pregnant/trying
- take at night on empty stomach
- high fat meals can increase toxicity
Raltegravir MOA
inhibits HIV from integrating with DNA
Raltegravir type
INSTIs
Raltegravir use
HIV and resistant HIV
Raltegravir side effects
insomnia, headaches, hepatotoxicity, hypersensitivity, elevation in serum amylase + lipase
Raltegravir implications
- Take with or without food
- get plasma HIV RNA level and CD4 T-cell count
Acyclovir (Zovirax) MOA
inhibits viral replication by suppressing synthesis of DNA
Acyclovir routes
Topical, PO, IV
Acyclovir uses
HSV, VZV, Cytomegalovirus
Acyclovir side effects
IV: phlebitis, reversible nephrotoxicity
PO: GI distress, vertigo
Topical: stinging
Acyclovir implications
- infuse slowly and drink extra fluids
- monitor BUN/creatinine
Valacyclovir (valtrex) routes
PO only
Valacyclovir class
prodrug of acyclovir
Valacyclovir side effects
Thrombocytopenia purpura/hemolytic uremic syndrome (TTP/HUS) in immunocompromised
3 types of influenza vaccines
IIV, RIV, LAIV
Flu vaccine side effects
- Injection site pain/redness
- fever 1-2 days
- LAIV - runny nose or congestion
- Guillain barre syndrome
Flu vaccine implications
- protection 1-2wks post
- Febrile illness - defer vaccine
- Don’t give LAIV to immunocompromised
- 6 months + should be vaccinated
Flu medications MOA
inhibit neuraminidase
Flu Vaccine meds
Oseltamivir, rimantadine, zanamivir
Oseltamivir use
flu A + B, prophylaxis
Rimantadine use
Flu A
Zanamivir use
Influenza, prophylaxis
Oseltamivir side effects
GI distress, severe hypersensitivity, neuropsychiatric effects in young
Rimantadine side effects
CNS - dizzy, nervous, insomnia
Zanamivir side effects
cough, sore throat
Oseltamivir implications
- start no later than 2 days after symptoms start
- take with food
ALL flu drugs
should not be given at same time as LAIV
Take around meals
PCN
Take with food
Cephalosporins, vancomycin, Oseltamivir
Take without food
- TB drugs
- Efavirenz
- lopinavir/ritonavir, fosamprenavir
Take w/food if in GI distress
tetracyclines, macrolides
With or without food
raltegravir