P2 Top 200 #1 Flashcards
Acyclovir
Zovirax
Acyclovir class
Viral DNA Polymerase Inhibitor
Acyclovir FDA indications
1.) Genital herpes simplex, adults, initial episode
400mg po tid or 200mg po five times daily.
2.) Genital herpes simplex, adults, recurrent episode
400mg TID for 5 days pr 800mg BID for 5 days or 800mg TID for 2 days
3.) Genital herpes simplex, suppressive therapy, 400mg BID for up to 12 months
4.) Herpes zoster (shingles)- 800mg po 5 times daily for 7-10 days
5.) Varicella (chickenpox)- 800mg QID
Acyclovir MOA
Competitively inhibits viral DNA synthesis by inactivation of viral DNA polymerase
Acyclovir contraindications
Hypersensitivity to acyclovir or valacyclovir
Acyclovir drug interactions
Phenytoin, fosphenytoin, valproic acid- decreased abosprtion and lower plasma concentration of phenytoin or valproic acid
Varicella vaccine, Zoster vaccine- decrease vaccine efficacy due to antagonism
Acyclovir adverse reactions
Common-malaise
Less common- N/V, HA, diarrhea
Rare, but serious- severe hypersensitivity, renal failure, TTP
Amoxicillin
Amoxil, Moxatag
Amoxicillin class
beta-lactam antibiotic
Amoxicillin common FDA indications
- ) Acute otitis media- 500-875mg po BID
- ) Lower respiratory tract infection- 1g po daily for 10 days
- ) Pharyngitis, tonsillitis- 775mg po daily x10 days
- ) Streptococcal pharyngitis- 1q po daily for 10 days
- ) Ear, nose, and throat infection, infection of skin and/or subcutaneous tissue, infection of genitourinary system- 500-875mg po Q 12 h for 10 days
- ) Helicobacter pylori GI tract infection- 1 g po BID with PPI
Amoxicillin MOA
Semisynthetic penicillin derivative that inhibits the biosynthesis of bacterial cell wall mucopeptide. Typically active against streptococcus, enterococcus, staphylococcus, and enterobacteriaceae
Amoxicillin drug interactions
Methotrexate- decreased methotrexate clearance
Venlafaxine- increased risk of serotonin syndrome
Warfarin- increased risk of bleeding
Typhoid and cholera vaccine- decreases vaccine efficacy
Sodium picosulfate- decreases therapeutic effect
Amoxicillin AE
Common- Diarrhea, nausea
Less common- skin rash, HA, vomiting
Rare but serious- severe hypersensitivity, renal failure, hepatic failure, pancytopenia
Amoxicillin/ Clavulanate
Augmentin
Amoxicillin/ Clavulanate MOA
Penicillin derivative that works against streptococcus, enterococcus, staphylococcus, and enterobacteriaceae. Clavulanate protects amoxicillin from degradation by beta lactamases
Amoxicillin/ Clavulanate class
beta-lactam antibiotic
Amoxicillin/ Clavulanate FDA indications
- ) Acute otitis media
- ) Community acquired pneumonia
- ) Lower resp tract infection
- ) Sinusitis
Amoxicillin/ Clavulanate contraindications
Penicillin allergy
ER products are contraindicated in patients in dialysis or with severe renal dysfunction
Amoxicillin/Clavulanate drug-drug interactions
Methotrexate- decreased methotrexate clearance, avoid.
Venlafaxine- Serotonin syndrome- avoid.
Warfarin- bleeding
Typhoid vaccine, cholera vaccine-decreases vaccine efficacy
Sodium picosulfate- decreases therapeutic effect.
Amoxicillin/ Clavulanate adverse reactions
Common- Nausea, diarrhea
Less common- Skin rash, vomiting, mycosis, cadidiasis
Rare, but serious- renal failure, hepatic failure, pancytopenia
Azithromycin
Zithromax, Z-Pak
Azithromycin class
Macrolide antibiotic
Azithromycin FDA indications
- ) Acute infective exacerbation of COPD
- ) Bacterial sinusitis
- ) Chancrois, nongonoccocal cervicitis
- ) Community acquired pneumonia
- ) Gonorrhea
- ) Streptococcal pharyngitis
Azithromycin MOA
Azithromycin binds to the 50S ribosomal subunit, thus interfering with microbial protein synthesis
Azithromycin drug interactions
Agents that prolong QTc interval and class III antiarrhythmics- Avoid
Statins- increased risk of rhabdo
Digoxin- Increased digoxin toxicity
Ergot alkaloids- contraindicated
nelfinavir- increased azithromycin concentrations
Warfarin- bleeding
Typhoid, cholera vaccine- decreased vaccine efficacy
Sodium picosulfate- decreased therapeutic effect
Azithromycin adverse reactions
Common- diarrhea, nausea, vomiting, abdominal pain
Less common- headache, elevates liver enzymes, flatulence
Rare, but serious- Steven-Johnson syndrome, severe hypersensitivity, myasthenia gravis, QTc prolongation, torsades de pointes, hepatitis
Cefdinir
Omnicef
Cefdinir class
3rd generation cephalosporin
Cefdinir MOA
3rd gen cephalosporin with activity against gram positive and negative bacteria including beta lactamase producing strains
Cefdinir FDA Indications
- ) Acute otitis media, pharyngitis, tonsilitis
- ) Bronchitis, acute, secondary bacterial infection
- ) Community-acquired pneumonia
Cefdinir drug interactions
Antacids, iron, vitamins-decreased absorption, separate by 12 h
Typhoid vaccine, cholera vaccine- decreased vaccine efficacy
Sodium picosulfate- decreased therapeutic effect
Cefdinir adverse effects
Common- diarrhea
Less common- N/V, vaginitis, HA
Rare, but serious- increased liver enzymes
Cephalexin
Keflex
Cephalexin FDA Indications
- ) Infection of skin and/or subcutaneous tissue
- ) Osteomyelitis
- ) Otitis media
- ) Streptococcal pharyngitis
Cephalexin class
First generation Cephalosporin
Cephalexin MOA
inhibits bacterial wall synthesis of actively dividing cells by binding to penicillin binding proteins. Effective against most gram-positive organisms.
Cephalexin drug interactions
Cholestyramine- decreases absorption of cephalexin
Metformin- increased metformin toxicity
Typhoid vaccine, cholera vaccine- decreased vaccine efficacy
Sodium picosulfate- antibiotics may decrease therapeutic effects
Cephalexin adverse effects
Common-Nausea
Less common- Vomiting
Rare, but serious- Steven-Johnson syndrome, renal failure, severe hypersensitivity, anemia, neutropenia, seizure
Chlorhexidine
Peridex, Paroex, Hibiclens
Chlorhexidine class
Antibacterial cleansing agent
Chlorhexidine FDA Indications
- ) Gingivitis
2. ) Skin or wound cleansing
Chlorhexidine MOA
Is an antiseptic and antimicrobial drug with bactericidal activity.
Chlorhexidine drug interactions
None
Chlorhexidine Adverse Effects
Common- mouth irrigation, tongue irritation, tooth aches and discolored teeth with oral rinse
Less common- GI irritation
Ciprofloxacin
Cipro, Cipro XR
Ciprofloxacin class
Fluroquinolone antibiotic
Ciprofloxacin FDA indications
- ) Anthrax, postexposure prophylaxis
- )Bacterial prostatitis
- ) Bronchitis
- ) UTI
Ciprofloxacin MOA
inhibits bacterial DNA gyrase. Highly active against aerobic, gram-neg bacilli
Ciprofloxacin BBW
Myasthenia gravis, tendon rupture and inflammation, peripheral neuropathy, CNS effects, cardiac, dermatologic, and hypersensitivity reactions, aortic dissection and rupture, hypoglycemia, mental health adverse effects
Ciprofloxacin drug interactions
Diabetic agents- hypoglycemia
Aluminum, calcium, magnesium antacids- decreased absorption of cipro by chelation
Corticosteroids- increased risk of tendon rupture
CYP1A2 substrates- increased substrate toxicity
Warfarin- increased risk of bleeding
P-glycoprotein inducers- reduces cipro efficacy
P-glycoprotein inhibitors- cipro toxicity
Typhoid and cholera vaccine- diminished vaccine effects
Sodium picosulfate- decreased therapeutic effect
Ciprofloxacin Adverse Effects
Common- Tooth discoloration in infants
Less common-N/V, rash, myalgia, arthralgia, tendinitis, HA
Rare, but serious- Steven-Johnson syndrome, renal failure, anemia, neutropenia, thrombocytopenia, seizure, cardiac effects, liver failure, myasthenia gravis, tendon rupture, renal failure, psychosis, QTc prolongation, peripheral neuropathy, CNS effects, severe cardiac, dermatologic and hypersensitivity reactions
Clindamycin
Cleocin
Clindamycin class
Lincosamide antibiotic