Antibacterials (ABX) Practice Exam

These questions are part of the practice quiz. Start practicing

• Which antibiotic class has notable interactions with warfarin and can increase INR, requiring monitoring?
• Which antibiotics are commonly avoided in pregnancy due to teratogenicity?
• Which antibiotic covers CA-MRSA?
• Pneumocystis jirovecii pneumonia is best treated with which antibiotic?
• Which antibiotic is a cephalosporin commonly used to cover Pseudomonas aeruginosa?
• What is an essential consideration with cephalosporin use in patients with a history of anaphylaxis to penicillin?
• Vancomycin covers which bacteria?
• In empiric therapy for hospital-acquired pneumonia, which agents are commonly used to cover MRSA in addition to anti-pseudomonal beta-lactams?
• What boxed warning is associated with metronidazole?
• Which antibiotic class requires therapeutic drug monitoring due to nephrotoxicity and ototoxicity risks?
• Which pathogens are commonly targeted for community-acquired pneumonia and what are common first-line options?
• What is the primary mechanism of action of macrolide antibiotics?
• Among tetracyclines, which is not associated with teeth discoloration?
• In Clostridioides difficile infection, what is a newer oral agent associated with lower recurrence and its mechanism?
• For penicillin-allergic patients, which antibiotic is commonly used as dental prophylaxis?
• Are cephalosporins active against Listeria monocytogenes?
• Which drug is commonly associated with metallic taste and glossitis?
• Which fluoroquinolone has activity against MRSA?
• Which antibiotic class is used as a last resort for MDR Gram-negative infections and has notable nephrotoxic and neurotoxic risks?
• Which is better absorbed, ampicillin or amoxicillin?
• First-line therapy for osteomyelitis often includes MRSA coverage with which agent?
• What is the rationale for using piperacillin-tazobactam in intra-abdominal infections?
• Which classes are most associated with antibiotic-associated diarrhea and Clostridioides difficile infection beyond clindamycin?
• Antistaphylococcal antibiotics are primarily used to treat infections caused by which organism?
• Ceftazidime-avibactam targets CRE primarily by inhibiting which enzyme?
• What is the role of linezolid in VRE infections and what is a major toxicity concern?
• Tx for C. diff?
• Which agent is a common first-line option for MRSA skin infections?
• True or false: Daptomycin is effective for treating pneumonia.
• Metronidazole is effective against anaerobes, Helicobacter pylori, protozoa, and Trichomonas vaginalis.
• Which of the following are respiratory fluoroquinolones?
• Which carbapenem is preferred over imipenem in patients with seizure disorder or pregnancy?
• Which antibiotic class is considered a last-resort option for multidrug-resistant gram-negative infections and is associated with nephrotoxicity and neurotoxicity?
• What is the role and spectrum of aztreonam?
• Linezolid interaction risk?
• Which antibiotics are commonly employed to cover Pseudomonas aeruginosa?
• Which statement about fidaxomicin is true?
• Linezolid belongs to which antibiotic class?
• Which boxed warning is associated with clindamycin?
• Which antibiotic carries MAOI-like risks and can interact dangerously with SSRIs?
• What are two major safety concerns with linezolid therapy?
• What is the primary mechanism of action of beta-lactam antibiotics?
• Empiric therapy for endocarditis commonly includes which combination?
• Which antibiotic belongs to the oxazolidinone class and is commonly used for MRSA infections?
• Which agent is primarily used to cover anaerobic bacteria and is a common component in intra-abdominal infection regimens?
• Which drug class inhibits folate synthesis and is commonly used for UTIs and Pneumocystis jirovecii pneumonia prophylaxis?
• What does MIC stand for and what does it measure?
• For MSSA infections, what is the preferred class of antibiotics?
• Which antibiotic classes are commonly associated with QT interval prolongation?
• Which drug is an antistaphylococcal penicillin?
• Which PK/PD index is most commonly targeted to optimize vancomycin therapy?
• Which carbapenem does NOT cover Pseudomonas?
• What is the mechanism of action of fluoroquinolones and which PK/PD index most closely predicts efficacy?
• Why does linezolid have a risk of serotonin syndrome with SSRIs?
• What is a standard empiric strategy to cover both MRSA and Pseudomonas in severe pneumonia?
• Which is a common first-line treatment for Helicobacter pylori in clarithromycin-susceptible patients?
• Which antibiotic covers both MRSA and Enterococcus?
• Meropenem-vaborbactam is used to combat ESBL- or KPC-producing organisms.
• Clarithromycin-based triple therapy for H. pylori includes which three components?
• What is the mechanism of action of rifamycins and a key consideration in their use?
• Which carbapenem is preferred in patients with seizure risk due to lower neurotoxicity?
• Which antibiotic is not suitable for treating pneumonia because it is inactivated by pulmonary surfactant?
• In CAP requiring hospitalization with concern for MRSA, which drug is an option to add?
• Which antibiotic class commonly causes photosensitivity?
• Aztreonam spectrum activity: which organism group does it primarily cover?
• MRSA coverage in pneumonia: which antibiotic is a key option?
• Trimethoprim-sulfamethoxazole has notable interactions with what class of drugs?
• Which agent is known for red man syndrome as an infusion-related reaction?
• Name a long-acting lipoglycopeptide used for SSTIs and bacteremia that allows weekly dosing.
• Which regimen is effective against CRE (carbapenem-resistant Enterobacterales) due to inhibition of beta-lactamases?
• In hospital-acquired pneumonia, what empiric regimen is used to cover both Pseudomonas and MRSA?
• What is the recommended first-line therapy for Pneumocystis jirovecii pneumonia?
• Which adverse effect is associated with macrolide antibiotics and warrants monitoring?
• Linezolid is effective against VRE.
• Which statement best contrasts ESBL-producing Enterobacterales and carbapenemase producers?
• Which adverse effects and cautions are commonly associated with trimethoprim-sulfamethoxazole?
• Why are tetracyclines contraindicated in pregnancy?
• What is the mechanism of action of rifamycins?
• Which statement describes CRE?
• What is the mechanism of action of fidaxomicin?
• Which antibiotic is the commonly used alternative for dental prophylaxis in penicillin-allergic patients undergoing at-risk endocarditis procedures?
• What is the typical spectrum and role of a third-generation cephalosporin like ceftriaxone?
• If a patient has a non-severe penicillin allergy (no anaphylaxis), what is the guidance regarding cephalosporin use?
• What is the primary mechanism of action of beta-lactam antibiotics?
• Which organism is Stenotrophomonas maltophilia most susceptible to, guiding therapy with Bactrim as DOC?
• Which antibiotic is a strong inducer of cytochrome P450 and can cause orange discoloration of body fluids?
• Daptomycin is approved for which infections?
• Do carbapenems cover MRSA or Pseudomonas?
• What are key considerations when prescribing antibiotics in pregnancy?
• What is the typical spectrum of activity for vancomycin?
• Which antimicrobial is preferred for treating mild Clostridioides difficile infection with oral therapy and has minimal systemic absorption?
• Which macrolide is best tolerated?
• Which antibiotic is not active against anaerobes?
• Which third-generation cephalosporin covers Pseudomonas aeruginosa?
• Penicillin G is used primarily for which type of bacteria?
• What are the key safety concerns and pregnancy considerations for tetracyclines?
• Doxycycline is used as drug of choice for which organisms?
• For outpatient prostatitis, which antibiotic is appropriate as a therapy option?
• Doxycycline is the drug of choice for which diseases?
• TMP-SMX is commonly used for Pneumocystis jirovecii pneumonia prophylaxis.
• Why is fosfomycin used for uncomplicated UTIs and what is its typical dosing?
• Which carbapenem is associated with seizures at high doses and is given with cilastatin to protect the kidney?
• Vancomycin is active against which type of bacteria?
• Amoxicillin is more rapidly absorbed than ampicillin.
• Which drug is a common choice for treating VRE infections and has activity against MRSA as well?
• Which agent is used to treat C. diff infection?
• Which antibiotic class can worsen neuromuscular blockade in patients with myasthenia gravis?
• First-line therapy for uncomplicated UTIs?
• Which statement about macrolides is true?
• What is a common mechanism of macrolide resistance?
• Which penicillin has to be taken 1-2 hours before or after a meal?
• Which agent is commonly used to treat infections caused by VRE?
• What is a major safety concern with polymyxins such as colistin?
• What PK/PD principle applies to aminoglycosides, and how is dosing typically optimized?
• What are the primary uses and major adverse effects of vancomycin?
• What is the route of administration for vancomycin when treating Clostridioides difficile infections?
• What is the drug of choice for Stenotrophomonas maltophilia infections?
• Clindamycin covers which types of bacteria?
• Which antibiotic has major interactions with QT-prolonging drugs and significant CYP interactions, requiring caution?
• For antibiotic surgical prophylaxis, timing and duration guidelines specify discontinuation within what time frame after surgery?
• Which antibiotic can cause red man syndrome if infused too rapidly?
• Which antibiotics are associated with CNS toxicity and tendon rupture risks, particularly in older adults?
• What is the mechanism of action of sulfonamides?
• Nitrofurantoin is used for uncomplicated cystitis. Which renal function criterion often limits its use?
• Which beta-lactam has activity against MRSA due to PBP2a binding?
• Carbapenems are often used to treat infections caused by ESBL-producing organisms.
• Which antibiotic class is primarily time-dependent in its killing activity?
• Which ABX is associated with serotonin syndrome?
• Which option best describes the use of cefiderocol?
• Which antibiotic is strongly associated with C. difficile infection risk?
• Carbapenems are primarily used for infections caused by which group?
• Why is nitrofurantoin appropriate for uncomplicated cystitis but not systemic infections?
• Name two major toxicities associated with aminoglycosides and a key monitoring practice.
• Why are tetracyclines contraindicated in pregnancy and in young children?
• Which antibiotic class is broadly associated with C. difficile infection risk and should be used with caution?
• Which statement about Teeth discoloration is correct?
• Name a major adverse effect and a key interaction for metronidazole.
• What is a common PK/PD target for vancomycin dosing?
• Which agent is commonly used to cover MRSA when treating hospital-acquired pneumonia?
• What vancomycin trough level targets are used for serious infections such as bacteremia?
• For outpatient CAP with risk of Pseudomonas infection, which antibiotic is preferred?
• Main adverse drug reaction of macrolides?
• For hospitalized but not critical prostatitis, which regimen is used?
• What vancomycin trough level range is typically targeted for serious infections?
• MRSA is resistant to most beta-lactams because it expresses PBP2a encoded by mecA. Which antibiotic is commonly effective against MRSA?
• When treating Pseudomonas infections, which pairing is commonly used to achieve synergistic effect?
• Which agent is a common first-line option for MRSA skin infections?
• Which of the following is NOT listed as a common first-line option for community-acquired pneumonia?
• Which statement about metronidazole-alcohol interaction is accurate?
• What is the purpose of endocarditis prophylaxis and which agent is commonly recommended?
• Are tetracyclines bacteriostatic or bactericidal?
• Long-term adverse effect of linezolid?
• Which statement correctly differentiates bactericidal versus bacteriostatic antibiotics?
• In a patient with a severe IgE-mediated penicillin allergy, which of the following are potential alternatives to cephalosporins?
• Which PK/PD parameter best correlates with efficacy for beta-lactam antibiotics?
• Which antibiotic is strongly associated with C. difficile infection risk, especially in the context of clindamycin use?
• Empiric meningitis therapy in adults over 50 includes an agent to cover Listeria: which drug?
• Linezolid has notable drug interaction risk with which type of medications?
• TMP-SMX can interact with warfarin. What is the clinical effect?
• Empiric therapy for meningitis in adults over 50 typically includes?
• Fidaxomicin is primarily used for which purpose?
• What is the role of metronidazole in typical antimicrobial regimens?
• What is the mechanism of action of cephalosporins?
• Which of the following is NOT an antistaphylococcal penicillin?
• Which agent covers anaerobes and is commonly used for intra-abdominal and gynecologic infections?
• Which drug class is mainly used for urinary tract infections?
• Which antibiotic is particularly associated with C. difficile infection risk and should be avoided when possible?
• In severe pneumonia, which drug can serve as the MRSA-active agent for empiric coverage?
• For anaerobic intra-abdominal infections, what is a classic first-line agent?
• For MSSA infections, what is the drug of choice?
• Which organism is not covered by ertapenem?
• Rifamycins are used as adjunct in certain infections due to their mechanism and interactions; which infection type is commonly treated as an adjunct?
• MOA of macrolides?
• Which agent is commonly used to provide anaerobic coverage in intra-abdominal and gynecologic infections, typically in combination with other agents?
• Metronidazole is used for infections caused by which of the following groups?
• Which fourth-generation cephalosporin covers Pseudomonas aeruginosa?
• Which drug is used for CA-MRSA?
• Carbapenems have cross-reactivity with which drugs?
• Which antibiotic is commonly used for streptococcal pharyngitis in penicillin-allergic patients?
• Which drug class is first-line for Bacillus anthracis, Francisella tularensis, and Salmonella Typhi?
• How does AUC24/MIC relate to vancomycin efficacy and toxicity?
• Which statement best describes macrolides' mechanism?
• Which regimen is used for uncomplicated UTIs?
• Which antibiotic is commonly used for dental prophylaxis in at-risk endocarditis patients, and what is the standard dose?
• Ceftazidime is a member of which generation of cephalosporins?
• Why is daptomycin not used for pneumonia?
• Cefepime belongs to which generation of cephalosporins?
• Which drug class is best for atypical pneumonia pathogens?
• Which antibiotic class is commonly used for atypical pneumonias?
• Which antibiotic classes are most strongly associated with antibiotic-associated diarrhea and C. difficile infection?
• What is the rationale and general practice for antibiotic de-escalation in inpatient therapy?
• Nafcillin is best described as an antibiotic with activity primarily against which organism?
• Which agent is a beta-lactam/beta-lactamase inhibitor combination used to treat ESBL-producing organisms and some carbapenemase producers?
• What is the purpose of using an aminoglycoside in combination therapy for severe Gram-negative infections?
• What is the mechanism of action of rifamycins (such as rifampin)?
• Daptomycin should not be used to treat pneumonia because it is inactivated by pulmonary surfactant.
• Which carbapenemase-targeting option is combined with a beta-lactam to combat ESBL or KPC-producing organisms?
• Which antibiotic class provides strong anti-pseudomonal coverage and is commonly used for Pseudomonas infections?
• What is the recommended empiric therapy for gonorrhea with coinfection risk?
• Which antibiotic class is associated with a high risk of tendon injury and QT prolongation?
• Daptomycin carries a risk of which adverse effect requiring CPK monitoring?
• Which antibiotic covers CA-MRSA and anaerobes?
• Which pharmacodynamic parameter best correlates with the efficacy of beta-lactam antibiotics?
• Which option best describes treatment considerations for severe IgE-mediated penicillin allergy?
• Which class interferes with folic acid synthesis?
• For outpatient CAP with no risk of Pseudomonas, which regimen is appropriate for empirical therapy?
• Which generation of cephalosporins is effective against MRSA?
• What is the standard antibiotic prophylaxis for dental procedures in high-risk patients?
• Delafloxacin is notable for activity against which resistant organism?
• Which statement about tetracycline safety in pregnancy and children?
• Which antibiotic is used as single-dose therapy for uncomplicated UTIs?
• Which beta-lactam/beta-lactamase inhibitor combination is commonly used to cover anaerobes in intra-abdominal infections?
• Tigecycline covers which of the following bacteria?
• What is the only fourth-generation cephalosporin?
• Daptomycin should not be used for pneumonia because it is inactivated by pulmonary surfactant.
• Oral vancomycin is mainly used for which condition?
• Which antibiotic can cause a disulfiram-like reaction with alcohol?
• In antibiotic pharmacodynamics, what does AUC/MIC describe?
• Besides photosensitivity, name another common adverse effect of tetracyclines.
• Which monobactam can be used safely in patients with penicillin allergies and what is its spectrum?
• Which antibiotic has lower recurrence of Clostridioides difficile infection compared with vancomycin?
• How does fidaxomicin compare with vancomycin in preventing recurrence of C. difficile infection?
• Linezolid has activity against which resistant organisms?
• What is a commonly used oral agent for initial management of Clostridioides difficile infection?
• Metronidazole has a well-known interaction with alcohol. What reaction occurs?
• An essential aspect of antibiotic surgical prophylaxis guidelines?
• Which bacteria are 5th-generation cephalosporins most notable for covering?
• What is a common first-line agent for uncomplicated urinary tract infections in nonpregnant women, depending on local resistance?
• Which drug can cause Red Man Syndrome, and when does this occur?
• Name a drug class effective against vancomycin-resistant enterococci (VRE).
• Which cephalosporin has strong anaerobic coverage and is often used in mixed intra-abdominal infections?
• Which carbapenem is most commonly associated with seizures at high doses and is given with cilastatin to protect the kidney?
• Which fluoroquinolone covers MRSA?
• What monitoring is required when using an aminoglycoside?
• Outpatient prostatitis single-agent therapy includes which option?
• Which agent is commonly used for MDR Gram-negative rods when alternatives are limited?
• Which antibiotic covers MRSA and VRE?