Antibiotics Flashcards
(107 cards)
Amoxicillin
Chemical Classification
Aminopenicillin
Amoxicillin
Functional Classification
Antiinfective, antiulcer
Amoxicillin
Mechanism of Action
Interferes with cell wall replication of susceptible organisms; the cell wall, rendered osmotically unstable, swells and bursts from osmotic pressure; bactericidal: lysis mediated by bacterial cell wall autolysins
Amoxicillin
Uses
Treatment of skin, respiratory, GI, GU infections, otitis media, gonorrhea; for gram-positive cocci (Staphylococcus aureus, Streptococcus pyogenes, Streptococcus faecalis, Streptococcus pneumoniae), gram-negative cocci (Neisseria gonorrhoeae, Neisseria meningitidis), gram-positive bacilli (Corynebacterium diphtheriae, Listeria monocytogenes), gram-negative bacilli (Haemophilus influenzae, Escherichia coli, Proteus mirabilis, Salmonella); Beta-lactase-negative organisms; prophylaxis of bacterial endocarditis; in combination with other products for treatment of Helicobacter pylori
Amoxicillin
Contraindications
Hypersensitivity to penicillins
Amoxicillin
Side Effects
CNS: headache, SEIZURES, agitation, confusion, dizziness, insomnia
GI: Nausea, Vomiting, Diarrhea, increased AST, ALT, abdominal pain, glossitis, colitis, PSEUDOMEMBRANOUS COLITIS, jaundice, cholestasis
HEMA: anemia, increased bleeding time, BONE MARROW DEPRESSION, GRANULOCYTOPENIA, HEMOLYTIC ANEMIA
INTEG: Urticaria, Rash
SYST: ANAPHYLAXIS, RESPIRATORY DISTRESS, SERUM SICKNESS, STEVENS-JOHNSON SYNDROME, TOXIC EPIDERMAL NECROLYSIS, EXFOLIATIVE DERMATITIS
Amoxicillin
Nursing Considerations
ASSESS:
- I&O ratio; report hematuria, oliguria because penicillin in high doses is nephrotoxic
- Hepatic studies: AST, ALT
- Blood studies: WBC, RBC, Hgb, Hct, bleeding time
- Renal studies: urinalysis, protein, blood, BUN, creatinine
- C&S before product therapy; product may be given as soon as culture is taken
- PSEUDOMEMBRANOUS COLITIS: bowel pattern before, during treatment; diarrhea, cramping, blood in stools; report to prescriber
- Skin eruptions after administration of penicillin to 1 wk after discontinuing product
- Respiratory status: rate, character, wheezing, tightness in chest
- ANAPHYLAXIS: rash, itching dyspnea, facial/laryngeal edema
PERFORM/PROVIDE
- Adrenaline, suction, tracheostomy set, endotracheal intubation equipment on unit
- Adequate intake of fluids (2L) during diarrhea episodes
- Scratch test to assess allergy after securing order from prescriber; usually done when penicillin is only product of choice
Amoxicillin
Anaphylaxis Treatment
Withdraw product, maintain airway; administer EPINEPHrine, aminophylline, O2, IV corticosteroids
Azithromycin
Functional Classification
Antiinfective
Azithromycin
Chemical Classification
Macrolide (azalide)
Azithromycin
Mechanism of Action
Binds to 50S ribosomal subunits of susceptible bacteria and suppresses protein synthesis; much greater spectrum of activity than erythromycin; more effective against gram-negative organisms
Azithromycin
Uses
Mild to moderate infections of the upper respiratory tract, lower respiratory tract; uncomplicated skin and skin structure infections caused by Moraxella catarrhalis, Streptococcus pneumoniae, Streptococcus pyogenes, Staphylococcus aureus, Streptococcus agalactiae, Mycoplasma pneumoniae, Haemophilus influenzae, Clostridium, Legionella pneumophilia; NGU or cervicitis due to Chlamydia trachomatis; in children: acute otitis media (H. influenzae, M. catarrhalis, S. pneumoniae) PO; acute pharyngitis/tonsillitis (group A streptococcal) PO; acute skin/soft tissue infections PO; community-acquired pneumonia (Chlamydia pneumoniae, H. influenzae, M. pneumoniae, S. pneumoniae) PO; pharyngitis/tonsillitis (S. pyogenes); prophylaxis of disseminated Mycobacterium avium complex (MAC)
Azithromycin
Contraindications
Hypersensitivity to azithromycin, erythromycin, any macrolide
Azithromycin
Side Effects
CNS: dizziness, headache, vertigo, somnolence, myasthenia gravis
CV: palpitations, chest pain
EENT: hearing loss, tinnitus, loss of smell (anosmia)
GI: Nausea, Vomiting, Diarrhea, HEPATOTOXICITY, abdominal pain, stomatitis, heartburn, dyspepsia, flatulence, melena, CHOLESTATIC JAUNDICE, PSEUDOMEMBRANOUS COLITIS, tongue discoloration
GU: vaginitis, moniliasis, nephritis
HEMA: anemia
INTEG: rash, urticaria, pruritus, photosensitivity
SYST: ANGIOEDEMA, STEVENS-JOHNSON SYNDROME, TOXIC EPIDERMAL NECROLYSIS
Azithromycin
Nursing Considerations
ASSESS:
- I&O ratio; report hematuria, oliguria with renal disease
- Hepatic studies: AST, ALT, CBC with differential
- Renal studies: urinalysis, protein, blood
- C&S before product therapy; product may be taken as soon as culture is taken; C&S may be repeated after treatment
- SERIOUS SKIN REACTIONS: STEVENS-JOHNSON SYNDROME, TOXIC EPIDERMAL NECROLYSIS, ANGIOEDEMA; DISCONTINUE IF RASH DEVELOPS, TREAT SYMPTOMATICALLY
- SUPERINFECTION: SORE THROAT, MOUTH, TONGUE; FEVER, FATIGUE, DIARRHEA, ANOGENITAL PRURITUS
- PSEUDOMEMBRANOUS COLITIS: DIARRHEA, ABDOMINAL PAIN, FEVER, FATIGUE, ANOREXIA; OBTAIN CBC, SERUM ALBUMIN
- Bowel pattern before, during treatment
- Respiratory status: rate, character; wheezing, tightness in chest: discontinue product
Azithromycin
Hypersensitivity Treatment
Withdraw product, maintain airway; administer EPINEPHrine, aminophylline, O2, IV corticosteroids
Clarithromycin
Functional Classification
Antiinfective
Clarithromycin
Chemical Classification
Macrolide
Clarithromycin
Mechanism of Action
Binds to 50S ribosomal subunits of susceptible bacteria and suppresses protein synthesis
Clarithromycin
Uses
Mild to moderate infections of the upper and lower respiratory tract, uncomplicated skin and skin-structure infections caused by Streptococcus pneumoniae, Mycoplasma pneumoniae, Legionella pneumophila, Moraxella catarrhalis, Neisseria gonorrhoeae, Corynebacterium diphtheriae, Listeria monocytogenes, Haemophilus influenzae, Streptococcus pyogenes, Staphylococcus aureus, Mycobacterium avium complex (MAC); complex infection in AIDS patients; Mycobacterium avium intracellulare, Helicobacter pylori in combination with omeprazole, H. parainfluenzae
Clarithromycin
Contraindications
Hypersensitivity to this product or macrolide antibiotics
Clarithromycin
Side Effects
CV: VENTRICULAR DYSRHYTHMIAS, QT PROLONGATION
GI: Nausea, Vomiting, Diarrhea, HEPATOTOXICITY, Abdominal Pain, stomatitis, heartburn, anorexia, Abnormal Taste, PSEUDOMEMBRANOUS COLITIS
GU: vaginitis, moniliasis
HEMA: leukopenia, thrombocytopenia, increased INR
INTEG: rash, urticaria, pruritus, STEVENS-JOHNSON SYNDROME, TOXIC EPIDERMAL NECROLYSIS
MISC: Headache, hearing loss
Clarithromycin
Nursing Considerations
ASSESS:
- INFECTION: wound characteristics, urine, stool, sputum, WBC, temp; C&S before product therapy; product may be given as soon as culture is taken; C&S may be repeated after treatment
- For ulcers: abdominal pain, bleeding in stools, emesis
- Renal, hepatic studies; report hematuria, oliguria
- Bowel pattern before, during treatment
- Respiratory status: rate, character, wheezing, tightness in chest; discontinue product
- Allergies before treatment, reaction to each medication
- QT PROLONGATION, VENTRICULAR DYSRHYTHMIAS: monitor ECG, cardiac status in those with underlying cardiac abnormalities
- SERIOUS SKIN REACTION: Stevens-Johnson syndrome, toxic epidermal necrolysis; product should be discontinued immediately
Clarithromycin
Hypersensitivity Treatment
Withdraw product, maintain airway, administer EPINEPHrine, aminophylline, O2, IV corticosteroids