piperacillin/tazobactam vs vancomycin
Side-by-side comparison of piperacillin/tazobactam and vancomycin. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
( 7.2 ) • Co-administration of ZOSYN with vancomycin may increase the incidence of acute kidney injury. Monitor kidney function in patients receiving ZOSYN and vancomycin. 7.3 Vancomycin Studies have detected an increased incidence of acute kidney injury in patients concomitantly administered piperacillin and tazobactam and vancomycin as compared to vancomycin alone [see Warnings and Precautions (5.6) ] .
Recommendation: Your healthcare provider should monitor your kidney function closely while you are receiving both of these medications.
Zosyn
Vancocin
Zosyn is a combination of two medicines, piperacillin and tazobactam. It is an antibiotic that fights bacterial infections.
Vancomycin is a strong antibiotic. It fights serious infections caused by certain bacteria.
Zosyn treats several types of infections caused by bacteria. It can treat infections in the stomach area for adults and kids 2 months and older. It can also treat pneumonia that starts in the hospital for adults and kids 2 months and older. In adults, Zosyn can treat skin infections, infections in the female pelvis, and pneumonia that starts outside the hospital.
Vancomycin treats serious infections caused by bacteria that are resistant to some other antibiotics. This includes infections like endocarditis (infection of the heart valves), septicemia (blood poisoning), bone infections, lung infections, and skin infections. It can also treat pseudomembranous colitis, a severe diarrhea caused by an overgrowth of bacteria in the colon.
Piperacillin kills bacteria. Tazobactam helps piperacillin work better by blocking enzymes that can break down piperacillin. This allows piperacillin to effectively fight the infection.
Vancomycin works by stopping bacteria from building their cell walls. Without a cell wall, the bacteria cannot survive. This helps your body fight off the infection.
- • Diarrhea
- • Constipation
- • Nausea
- • Headache
- • Trouble sleeping
- • Flushing of the upper body ('red neck')
- • Pain or muscle spasm in the chest and back
- • Inflammation at the injection site
- Acute Kidney Injury 915
- Pyrexia 869
- Thrombocytopenia 471
- Drug Interaction 463
- Pneumonia 450
- Acute Kidney Injury 4,178
- Pyrexia 3,513
- Drug Reaction With Eosinophilia And Systemic Symptoms 2,311
- Renal Failure 2,196
- Sepsis 2,060
Zosyn can cause severe allergic reactions. Tell your doctor right away if you have a rash or trouble breathing. Zosyn can also cause severe skin reactions, blood problems, seizures, kidney problems, and severe diarrhea. If you have any of these, contact your doctor immediately.
Rapid infusions of vancomycin can cause a sudden drop in blood pressure, wheezing, trouble breathing, hives, or itching. Severe skin reactions like Stevens-Johnson syndrome and toxic epidermal necrolysis have also been reported.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if Zosyn will harm your unborn baby. Talk to your doctor about the risks and benefits of using Zosyn during pregnancy. It is also not known if Zosyn passes into breast milk.
Tell your doctor if you are pregnant or breastfeeding. It is not known if vancomycin will harm an unborn baby. Vancomycin passes into breast milk, so talk to your doctor about the best way to feed your baby if you need to take this medicine.
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How to Read This piperacillin/tazobactam vs vancomycin Comparison
piperacillin/tazobactam is classified in the Penicillin / Beta-Lactamase Inhibitor drug class, while vancomycin sits within the Glycopeptide Antibiotic class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, piperacillin/tazobactam has 3,168 submissions while vancomycin has 14,258. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to taking these two antibiotics together can increase the risk of sudden damage to your kidneys.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between piperacillin/tazobactam and vancomycin - always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.