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Antimicrobials
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·
Culture
first!
·
Give at
regular intervals
·
Check for
superimposed infection (good/bad microbes out of wack
·
Take ALL of
medicine
Aminoglycosides
(Mycins):
Penicillins Cephalosporins (Cef- Kef): Erythromycins (macrolydes) “Ilo” Tetracycline |
Aminoglycosides
(Mycins):
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·
These are
not systemically absorbed when given by mouth! (these don’t include erythromycin)
o
Streptomycin o
Gentamycin
o
Oral
administration for bowel disinfection only, poorly absorbed from GI tract:
Neomycin (prep for bowel sx to kill bacteria, or liver failure to kill off
bacteria that cause ammonia which would put them in hepatic coma), Kanamycin
o
When given
IV or IM can treat systemic infections
o
Adverse
effects: think shape of ear and kidney
§
8th
cranial nerve damage: hearing loss, tinnitus, balance
§
Nephrotoxicity:
BUN, creatinine clearance, I&O check
these!
§
Neuromuscular
blockade: don’t give to MG
§
Check peaks
and troughs!!! IV 30 min later, IM 60
min later to check peaks
o
An adult
has been getting gent IV q8hrs. Which lab test to check?
§
BUN and
serum creatinine
o
Adult gent
q8h for days. Adverse rxn?
§
Tinnitus
o
Vancomycin:
for severe infections, ATB induced pseudomembranous colitis
§
“mean-o-mycin
Monitor ototoxicity and renal toxicity
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Penicillins
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·
gram + and
– infections: Gonococcus, meningococcus, penumococcus, streptococcus, treponema
(will cause syphilis)
o
Allergic
rxns! Minor to shock.
o
GI upset!
NVD, but take PO on empty stomach. Probenicid increases blood levels of
penicllin.
o
Penicillin
V K 500 ordered. Took penicllin taken 2 mo ago. Nurse should:
§
Rarely get
allergic rxn first time you take
penicllin. You should observe for skin rashes and signs of rxn
o
Nurse
telling pt about taking penicllin qid. Take:
§
On empty
stomach at 6-hr intervals
o
Infant
amoxicllin. Nurse tell parents:
Give child all med in bottle. Suspensions have no
potency after some weeks
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Cephalosporins (Cef- Kef):
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·
cephalexin
(Keflex), cefazolin (ancef)
o
*** Cross
allergy to penicllin. Allergic to penicllin, 25% chance they will be allergic
to cephalosprorins. Ask them!
o
Renal
toxic.
o
Keflex
ordered. Allergy to penicllin. Appropriate initial action for nurse:
Ask client to describe rxn. Many pts say allergy if
they got diarrhea, or mild rash. Not really allergic rxn.
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Erythromycins (macrolydes) “Ilo”
|
o
Given to
pts allergic to peniclllin.
o
Enteric
coated tabs. Won’t disolve in stomach. Acid decreases activity of erythromycin.
Don’t give with meals or acids!
o
Legionnaire’s:
resp infection, mycoplasma (walking pneumonia), chlamydia, borrelia,
helicobacter pylori
o
Erythromycin
for adult. Nurses instruction:
Take on empty stomach with full glass of water
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Tetracycline
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·
rickettsia,
mycoplasma, chlamydia, acne.
o
No milk
products, zinc or iron.
o
Photosensitivity.
Causes rashes
Gray teeth in children! Even second teeth. Don’t take
under 8 or in pregnancy
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Chloramphenicl, Chloromycetin
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·
BIG GUNS!
Used when nothing else works
o
severe
toxicity, aplastic anemia (BM suppression) . Seious!
Uses: H flu meningitis, typhoid fever, rocky mt
spotted fever
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Quinolone:
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·
gram –
bacteria including pseudomonas. Some gram + organisms.
o
Examples:
norfloxacin (noroxin) used for UTI
Ciprofloxacin (Cipro) used for systemic infections,
achieves good serum levels
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Sulfonamides:
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·
: “sulfa,
gant”
o
Sulfisoxazole,
sulfasalazine
o
Uses: UTI,
UC, Crohn, bowel prep
o
AE: skin
(rash in sun), NV, renal (stones), GI, photosensitivity
o
Push
fluids!
o
Sulfisoxasole,
adult with UTI. Take with water and drink more fluids. Reason for instructions:
Drinking fluids will help prevent stone formation
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UTI drugs:
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·
Urinary
antiinfectives: methenamine mandelate, mandelamine, Nitrofuradantin (acid urine works best! Drink cranberry),
When hear dantins: think UTI!
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Antitubercular drugs
|
o
INH
(Isonaiazid)
§
Liver
toxicity, perpheral neuritis (give with Vit B6) nerve pain! Give pyrodoxine! B6
o
PAS (para
amino salicylate sodium: GI SE (give with meals) sounds like asprin- think GI
o
Rifampin
(Rimactane)
§
Body fluids
are red, affects drug actions. Affects birth control!
o
Ethambutol
§
Optic
neurities (red/green color blind)
§
Elevated
uric acid à gout
Strept given IM, PAS with food, the rest on empty
stomach. On 3-4 drugs for 9-12 mo.
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Antiviral
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o
Acyclovir
(zovirax)
§
For herpes,
doesn’t cure or prevent transmission.
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Antiretroviral drugs
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A. Nucleoside Analogues
1. Inhibit replication of HIV virus by
inhibiting the transcription of RNA and DNA.
2. Drugs
a. Didanosine (Videx) (ddl)
b. Lamivudine
(3TC) (Epivir)
c. Stavudine
(d4T) (Zerit) d. Zidovudine
(AZT) (Retrovir)
3. Major adverse effect is bone marrow
suppression
4. Teach patient and family
a. Drugs
do not cure AIDS but will control symptoms
b. Call
physician if signs of other infections such as sore throat or swollen
lymph nodes
c. Patient
is still infective and must use methods to prevent transmission
of AIDS virus • d. Avoid
OTC products because of the many incompatibilities.
B. Non Nucleoside Analogues
1. Inhibit replication of HIV virus; do
not cure AIDS
2. Drugs
a. Delavirdine
(DLV) (Rescriptor)
b. Nevirapine
(NVP) (Viramune)
3. Side effects / nursing care
a. Monitor
liver enzymes
b. Nevirapine
decreases effectiveness of oral
contraceptives
c. Nevirapine
is always given with at least one other antiviral to prevent resistance.
d. Severe
rash
C. Protease Inhibitors
1. Inhibit replication of HIV virus; do
not cure AIDS
2. Drugs
a. Indinavir
(Crixivan)
b. Nelfinavir
(Viracept)
c. Ritonavir
(Norvir)
d. Saquinavir
(Invirase)
3. Adverse Effects / Nursing Care
a. Use
cautiously with other drugs..
b. Take
with food.
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Antifungals
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A. Used
to fungi or yeast infections that may be systemic such as histoplasmosis, vaginal
such as candida or affect the skin such as tinea (ringworm).
B. Amphotericin B (Fungazone)
Treatment of systemic fungal
infections such as histoplasmosis
1. Given IV
2. Very toxic
a. Fever
b. Hypokalemia
c. Azotemia
d. Blood
dyscrasias due to bone marrow suppression
3. Give acetaminophen, diphenhydramine
(Benadryl) and steroids prior to infusion to prevent adverse reactions
C. Nystatin
(Mycostatin)
1. Used to treat gastrointestinal and
vaginal candida (yeast) infections.
2. Can be given orally as tablets, oral
suspension (for thrush) or as vaginal tablets.
3. Tell patient to take medication for
2 weeks after symptoms improve to prevent
reinfection.
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Nystatin/Mycostatin
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o
Yeast
infections
PO and vaginal
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