Exam 2 2025 – Complete Study Guide &
Practice Questions
what drug class does gentamicin belong to?
Aminoglycosides
What is the indicated use of aminoglycosides?
- Treat severe infections of the abdomen and urinary tract, hospital acquired pneumonia, bacteremia,
and endocarditis
- serious gram-negative bacterial infections and infections caused by staphylococci when penicillins or
other less toxic drugs are contraindicated
Which antibiotics inhibit protein synthesis?
tetracyclines, macrolides, aminoglycosides
what are the pharmacokinetics of gentamicin?
- absorption: well absorbed IM and IV
- distribution: widely distributed in extracellular fluid, cross placenta, small amount enters breast milk,
poor penetration into CSF
- metabolism and excretion: >90% renal
- half life: 2-4 hr or longer in renal impairment
What drugs fall into the aminoglycoside drug class?
gentamicin, streptomycin, amikacin, neomycin, trobramicin
What are the most common side effects and adverse effects of aminoglycosides (symptoms
associated)?
- ototoxicity: ringing in the ears
- anemia: fatigue, feeling cold, dizziness, pallor
- thrombocytopenia: excessive bruising, petechiae, excessive bleeding
- nephrotoxicity: oliguria, edema, hypertension
What is oliguria?
-Less than 500 cc of urine in 24 hours
-low urine output
, What is the concern when a patient is experiencing oliguria?
- impaired renal function possibly due to nephrotoxicity of a med or illness
- can alter the electrolyte balance and fluid balance of the body resulting in hypo/hypernatremia or
hypo/hyperkalemia
What is a broad spectrum antibiotic?
A drug effective against a wide variety of microbial species
when would a narrow spectrum antibiotic be used?
- used for the specific infection when the causative organism is known.
- They will not kill as many of the normal micro organisms in the body as the broad spectrum antibiotics
What are the common side effects of penicillins?
n/v/d, epigastric distress, pain at IM injection site, phlebitis at IV site, rash
what are the serious adverse reactions associated with penicillin?
CDAD (C. diff diarrhea), hypersensitivity reactions, steven-johnson disease
What two antibiotic classes are people frequently allergic to both of if they have a known allergy to
one?
penicillins and cephalosporins
What are penicillins used to treat?
strep throat, otitis media, sinusitis, cystitis, and syphilis
what should a nurse do if the peak level of a medication is too high?
monitor for signs of toxicity, give extra fluids and prescribed diuretic to encourage excretion of excess
drug through the kidneys
what is a culture and sensitivity test?
Process of growing isolated organisms and identifying the most effective antibiotic for treatment
When would a culture and sensitivity test be done?
it is performed when there is an infection that is not responding to broad spectrum antibiotics and the
specific microbe needs to be identified
what is the most commonly prescribes fluoroquinolone?
ciprofloxacin
What are the weird adverse reaction associated with ciprofloxacin?
tendon rupture