piperacillin/tazobactam vs tobramycin
Side-by-side comparison of piperacillin/tazobactam and tobramycin. 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 DRUG INTERACTIONS • ZOSYN administration can significantly reduce tobramycin concentrations in hemodialysis patients. Monitor tobramycin concentrations in these patients. In vivo inactivation : When aminoglycosides are administered in conjunction with piperacillin to patients with end-stage renal disease requiring hemodialysis, the concentrations of the aminoglycosides (especially tobramycin) may be significantly reduced and should be monitored.
Recommendation: If you are on dialysis, your doctor should monitor your tobramycin blood levels to make sure the dose is still working.
Zosyn
Tobi, Nebcin
Zosyn is a combination of two medicines, piperacillin and tazobactam. It is an antibiotic that fights bacterial infections.
Tobramycin is an antibiotic medicine. It fights serious bacterial infections in your body.
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.
Tobramycin treats serious infections caused by bacteria. This includes infections in the blood, lungs, brain (meningitis), belly, skin, bones, and urinary tract. It is used when other antibiotics might not work or are too harmful.
Piperacillin kills bacteria. Tazobactam helps piperacillin work better by blocking enzymes that can break down piperacillin. This allows piperacillin to effectively fight the infection.
Tobramycin belongs to a class of drugs called aminoglycoside antibiotics. It works by stopping the growth of bacteria. This helps your body fight off the infection.
- • Diarrhea
- • Constipation
- • Nausea
- • Headache
- • Trouble sleeping
- • Nausea
- • Vomiting
- • Diarrhea
- • Headache
- • Lethargy
- Acute Kidney Injury 915
- Pyrexia 869
- Thrombocytopenia 471
- Drug Interaction 463
- Pneumonia 450
- Death 1,666
- Infective Pulmonary Exacerbation Of Cystic Fibrosis 1,559
- Pneumonia 1,450
- Dyspnoea 1,373
- Cystic Fibrosis 1,263
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.
Tobramycin can potentially damage your hearing and kidneys. Tell your doctor if you have kidney problems or hearing loss before starting this medicine. Your doctor will monitor your kidney and hearing function during treatment. Report any dizziness, ringing in the ears, or changes in hearing or kidney function to your doctor right away.
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. Tobramycin may harm your unborn baby. It is not known if tobramycin passes into breast milk.
Also Compare, Nearby Drugs
Compare piperacillin/tazobactam with
Compare tobramycin with
How to Read This piperacillin/tazobactam vs tobramycin Comparison
piperacillin/tazobactam is classified in the Penicillin / Beta-Lactamase Inhibitor drug class, while tobramycin sits within the Aminoglycoside 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 tobramycin has 7,311. 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 in patients on dialysis, piperacillin can chemically deactivate tobramycin in the blood, making the antibiotic less effective.. 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 tobramycin - 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.