Piperacillin and tazobactam interactions

Piperacillin and tazobactam (Zosyn), a penicillin antibiotic has 103 documented interactions across the FDA labels and fact sheets we index: 28 major, 57 moderate, 18 minor, and 0 where a label reports no significant interaction. Each entry below quotes the sentence behind it. This drug page is a starting point, not a verdict for your situation.

Interactions from the label

Major interactions (28)

  • Amoxicillinpenicillin antibioticMajor

    AMOXIL is contraindicated in patients who have experienced a serious hypersensitivity reaction (e.g., anaphylaxis or Stevens-Johnson syndrome) to AMOXIL or to other β-lactam antibacterial drugs (e.g., penicillins and cephalosporins). (Amoxicillin label, Contraindications)

  • Amoxicillin and clavulanatepenicillin antibioticMajor

    History of a serious hypersensitivity reaction (e.g., anaphylaxis or Stevens-Johnson syndrome) to AUGMENTIN or to other beta‑lactams (e.g., penicillins or cephalosporins). (Amoxicillin and clavulanate label, Contraindications)

  • Ampicillinpenicillin antibioticMajor

    CONTRAINDICATIONS The use of Ampicillin is contraindicated in individuals with a history of serious hypersensitivity reactions (e.g., anaphylaxis or Stevens-Johnson syndrome) to ampicillin or to other beta-lactam antibacterial drugs. (Ampicillin label, Contraindications)

  • Ampicillin and sulbactampenicillin antibioticMajor

    CONTRAINDICATIONS The use of UNASYN is contraindicated in individuals with a history of serious hypersensitivity reactions (e.g., anaphylaxis or Stevens-Johnson syndrome) to ampicillin, sulbactam or to other beta-lactam antibacterial drugs (e.g., penicillins and cephalosporins). (Ampicillin and sulbactam label, Contraindications)

  • CefaclorcephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CefadroxilcephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CefazolincephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CefdinircephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CefepimecephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CefiximecephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CefotaximecephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CefotetancephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CefoxitincephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CefpodoximecephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CefprozilcephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CeftarolinecephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CeftazidimecephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CeftriaxonecephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CefuroximecephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • CephalexincephalosporinMajor

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection is contraindicated in patients with a history of allergic reactions to any of the penicillins, cephalosporins, or betalactamase inhibitors. (Piperacillin and tazobactam label, Contraindications)

  • Demeclocyclinetetracycline antibioticMajor

    Since bacteriostatic drugs may interfere with the bactericidal action of penicillins, it is advisable to avoid giving tetracycline-class drugs in conjunction with penicillin. (Demeclocycline label, Drug interactions)

  • Doxycyclinetetracycline antibioticMajor

    Avoid co-administration of tetracyclines with penicillin. (Doxycycline label, Drug interactions)

  • ErtapenemantibioticMajor

    INVANZ is contraindicated in patients with known hypersensitivity to any component of this product or to other drugs in the same class or in patients who have demonstrated anaphylactic reactions to beta-lactams. (Ertapenem label, Contraindications)

  • Hypersensitivity Reactions: Serious and occasionally fatal hypersensitivity (anaphylactic) reactions have been reported in patients receiving therapy with beta-lactams. (Imipenem and cilastatin label, Warnings and precautions)

  • Minocyclinetetracycline antibioticMajor

    Penicillin Because bacteriostatic drugs may interfere with the bactericidal action of penicillin, avoid giving EMROSI in conjunction with penicillin. (Minocycline label, Drug interactions)

  • Probenecid prolongs the half-lives of piperacillin and tazobactam and should not be co-administered with Piperacillin and Tazobactam for Injection and Sodium Chloride Injection unless the benefit outweighs the risk. (Piperacillin and tazobactam label, Drug interactions)

  • Probenecid prolongs the half-lives of piperacillin and tazobactam and should not be co-administered with Piperacillin and Tazobactam for Injection and Sodium Chloride Injection unless the benefit outweighs the risk. (Piperacillin and tazobactam label, Drug interactions)

  • Tetracyclinetetracycline antibioticMajor

    Drug Interactions Since bacteriostatic drugs may interfere with the bactericidal action of penicillin, it is advisable to avoid giving tetracycline in conjunction with penicillin or other bactericidal antibacterials. (Tetracycline label, Drug interactions)

Moderate interactions (57)

  • AmikacinaminoglycosideModerate

    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. (Piperacillin and tazobactam label, Drug interactions)

  • ApixabananticoagulantModerate

    Monitor coagulation parameters in patients receiving Piperacillin and Tazobactam for Injection and Sodium Chloride Injection and heparin or oral anticoagulants. (Piperacillin and tazobactam label, Drug interactions)

  • ArgatrobananticoagulantModerate

    Monitor coagulation parameters in patients receiving Piperacillin and Tazobactam for Injection and Sodium Chloride Injection and heparin or oral anticoagulants. (Piperacillin and tazobactam label, Drug interactions)

  • Atracuriumneuromuscular blockerModerate

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection may prolong the neuromuscular blockade of vecuronium and other non-depolarizing neuromuscular blockers. (Piperacillin and tazobactam label, Drug interactions)

  • AztreonamantibioticModerate

    Use caution when CAYSTON is administered to patients with a known allergic reaction to beta-lactams. (Aztreonam label, Warnings and precautions)

  • Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Benazepril and hydrochlorothiazide label, Warnings)

  • Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Bisoprolol and hydrochlorothiazide label, Warnings)

  • BivalirudinanticoagulantModerate

    Monitor coagulation parameters in patients receiving Piperacillin and Tazobactam for Injection and Sodium Chloride Injection and heparin or oral anticoagulants. (Piperacillin and tazobactam label, Drug interactions)

  • Botulinum toxin type Aneuromuscular blockerModerate

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection may prolong the neuromuscular blockade of vecuronium and other non-depolarizing neuromuscular blockers. (Piperacillin and tazobactam label, Drug interactions)

  • Candesartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Candesartan and hydrochlorothiazide label, Warnings)

  • Cholestyraminebile acid sequestrantModerate

    Drug Interactions Cholestyramine for Oral Suspension USP may delay or reduce the absorption of concomitant oral medication such as phenylbutazone, warfarin, thiazide diuretics (acidic), or propranolol (basic), as well as tetracycline, penicillin G, phenobarbital, thyroid and thyroxine preparations, estrogens and progestins, and digitalis. (Cholestyramine label, Drug interactions)

  • Cisatracuriumneuromuscular blockerModerate

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection may prolong the neuromuscular blockade of vecuronium and other non-depolarizing neuromuscular blockers. (Piperacillin and tazobactam label, Drug interactions)

  • Colestipolbile acid sequestrantModerate

    The absorption of tetracycline, furosemide, penicillin G, hydrochlorothiazide, and gemfibrozil was significantly decreased when given simultaneously with colestipol hydrochloride; these drugs were not tested to determine the effect of administration one hour before colestipol hydrochloride. (Colestipol label, Drug interactions)

  • DabigatrananticoagulantModerate

    Monitor coagulation parameters in patients receiving Piperacillin and Tazobactam for Injection and Sodium Chloride Injection and heparin or oral anticoagulants. (Piperacillin and tazobactam label, Drug interactions)

  • Dichlorphenamidecarbonic anhydrase inhibitorModerate

    Drugs that Cause Hypokalemia The risk of hypokalemia is greater with coadministration of KEVEYIS and other drugs that can cause hypokalemia (e.g., loop diuretics, thiazide diuretics, laxatives, antifungals, penicillins, and theophylline) [see Warnings and Precautions (5.3) ] . (Dichlorphenamide label, Drug interactions)

  • Dicloxacillinpenicillin antibioticModerate

    Nephrotoxicity in critically ill patients has been observed; the use of piperacillin and tazobactam was found to be an independent risk factor for renal failure and was associated with delayed recovery of renal function as compared to other beta-lactam antibacterial drugs in a randomized, multicenter, controlled trial in critically ill patients. (Piperacillin and tazobactam label, Warnings and precautions)

  • EdoxabananticoagulantModerate

    Monitor coagulation parameters in patients receiving Piperacillin and Tazobactam for Injection and Sodium Chloride Injection and heparin or oral anticoagulants. (Piperacillin and tazobactam label, Drug interactions)

  • Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Enalapril and hydrochlorothiazide label, Warnings)

  • EnoxaparinanticoagulantModerate

    Monitor coagulation parameters in patients receiving Piperacillin and Tazobactam for Injection and Sodium Chloride Injection and heparin or oral anticoagulants. (Piperacillin and tazobactam label, Drug interactions)

  • FondaparinuxanticoagulantModerate

    Monitor coagulation parameters in patients receiving Piperacillin and Tazobactam for Injection and Sodium Chloride Injection and heparin or oral anticoagulants. (Piperacillin and tazobactam label, Drug interactions)

  • FosfomycinantibioticModerate

    Increased Transaminase Levels In Trial 1, increases in transaminases occurred more frequently in CONTEPO-treated patients compared to piperacillin/tazobactam-treated patients. (Fosfomycin label, Warnings and precautions)

  • GentamicinaminoglycosideModerate

    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. (Piperacillin and tazobactam label, Drug interactions)

  • HeparinanticoagulantModerate

    Monitor coagulation parameters in patients receiving Piperacillin and Tazobactam for Injection and Sodium Chloride Injection and heparin or oral anticoagulants. (Piperacillin and tazobactam label, Drug interactions)

  • Hydrochlorothiazidethiazide diureticModerate

    Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Hydrochlorothiazide label, Warnings and precautions)

  • IncobotulinumtoxinAneuromuscular blockerModerate

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection may prolong the neuromuscular blockade of vecuronium and other non-depolarizing neuromuscular blockers. (Piperacillin and tazobactam label, Drug interactions)

  • Irbesartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Irbesartan and hydrochlorothiazide label, Warnings and precautions)

  • LeflunomideimmunosuppressantModerate

    In patients taking ARAVA, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. (Leflunomide label, Drug interactions)

  • Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Lisinopril and hydrochlorothiazide label, Warnings)

  • Losartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Losartan and hydrochlorothiazide label, Warnings and precautions)

  • MethotrexateimmunosuppressantModerate

    Methotrexate Limited data suggests that co-administration of methotrexate and piperacillin may reduce the clearance of methotrexate due to competition for renal secretion. (Piperacillin and tazobactam label, Drug interactions)

  • Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Metoprolol and hydrochlorothiazide label, Warnings and precautions)

  • MycophenolateimmunosuppressantModerate

    Examples Cyclosporine A, trimethoprim/sulfamethoxazole, bile acid sequestrants (cholestyramine), rifampin as well as aminoglycoside, cephalosporin, fluoroquinolone and penicillin classes of antimicrobials Drugs Modulating Glucuronidation Clinical Impact Concomitant use with drugs inducing glucuronidation decreases MPA systemic exposure, potentially reducing mycophenolate… (Mycophenolate label, Drug interactions)

  • Nafcillinpenicillin antibioticModerate

    Nephrotoxicity in critically ill patients has been observed; the use of piperacillin and tazobactam was found to be an independent risk factor for renal failure and was associated with delayed recovery of renal function as compared to other beta-lactam antibacterial drugs in a randomized, multicenter, controlled trial in critically ill patients. (Piperacillin and tazobactam label, Warnings and precautions)

  • NeomycinaminoglycosideModerate

    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. (Piperacillin and tazobactam label, Drug interactions)

  • Olmesartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Olmesartan and hydrochlorothiazide label, Warnings and precautions)

  • Olmesartan, amlodipine, and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Olmesartan, amlodipine, and hydrochlorothiazide label, Warnings and precautions)

  • OnabotulinumtoxinAneuromuscular blockerModerate

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection may prolong the neuromuscular blockade of vecuronium and other non-depolarizing neuromuscular blockers. (Piperacillin and tazobactam label, Drug interactions)

  • Oxacillinpenicillin antibioticModerate

    Nephrotoxicity in critically ill patients has been observed; the use of piperacillin and tazobactam was found to be an independent risk factor for renal failure and was associated with delayed recovery of renal function as compared to other beta-lactam antibacterial drugs in a randomized, multicenter, controlled trial in critically ill patients. (Piperacillin and tazobactam label, Warnings and precautions)

  • Penicillin Gpenicillin antibioticModerate

    Nephrotoxicity in critically ill patients has been observed; the use of piperacillin and tazobactam was found to be an independent risk factor for renal failure and was associated with delayed recovery of renal function as compared to other beta-lactam antibacterial drugs in a randomized, multicenter, controlled trial in critically ill patients. (Piperacillin and tazobactam label, Warnings and precautions)

  • Penicillin Vpenicillin antibioticModerate

    Nephrotoxicity in critically ill patients has been observed; the use of piperacillin and tazobactam was found to be an independent risk factor for renal failure and was associated with delayed recovery of renal function as compared to other beta-lactam antibacterial drugs in a randomized, multicenter, controlled trial in critically ill patients. (Piperacillin and tazobactam label, Warnings and precautions)

  • PlazomicinaminoglycosideModerate

    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. (Piperacillin and tazobactam label, Drug interactions)

  • ProtamineModerate

    Drug Interactions Protamine sulfate has been shown to be incompatible with certain antibiotics, including several of the cephalosporins and penicillins (see DOSAGE AND ADMINISTRATION ). (Protamine label, Precautions)

  • Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Quinapril and hydrochlorothiazide label, Warnings)

  • RivaroxabananticoagulantModerate

    Monitor coagulation parameters in patients receiving Piperacillin and Tazobactam for Injection and Sodium Chloride Injection and heparin or oral anticoagulants. (Piperacillin and tazobactam label, Drug interactions)

  • Rocuroniumneuromuscular blockerModerate

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection may prolong the neuromuscular blockade of vecuronium and other non-depolarizing neuromuscular blockers. (Piperacillin and tazobactam label, Drug interactions)

  • SalsalateNSAIDModerate

    Salicylate competes with a number of drugs for protein binding sites, notably penicillin, thiopental, thyroxine, triiodothyronine, phenytoin, sulfinpyrazone, naproxen, warfarin, methotrexate, and possibly corticosteroids. [When Salsalate tablets, USP are administered with aspirin, its protein binding is reduced, although the clearance of free Salsalate tablets,… (Salsalate label, Drug interactions)

  • Spironolactone and hydrochlorothiazidealdosterone antagonistModerate

    Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Spironolactone and hydrochlorothiazide label, Warnings)

  • Succinylcholineneuromuscular blockerModerate

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection may prolong the neuromuscular blockade of vecuronium and other non-depolarizing neuromuscular blockers. (Piperacillin and tazobactam label, Drug interactions)

  • Telmisartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Telmisartan and hydrochlorothiazide label, Warnings and precautions)

  • TeriflunomideimmunosuppressantModerate

    In patients taking AUBAGIO, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. (Teriflunomide label, Drug interactions)

  • TobramycinaminoglycosideModerate

    Piperacillin and Tazobactam for Injection and Sodium Chloride Injection administration can significantly reduce tobramycin concentrations in hemodialysis patients. (Piperacillin and tazobactam label, Drug interactions)

  • Triamterenepotassium-sparing diureticModerate

    …from blood bank (may contain up to 30 mEq of potassium per liter of plasma or up to 65 mEq per liter of whole blood when stored for more than 10 days); low-salt milk (may contain up to 60 mEq of potassium per liter); potassium-containing medications (such as parenteral penicillin G potassium); salt substitutes (most contain substantial amounts of potassium). (Triamterene label, Drug interactions)

  • Triamterene and hydrochlorothiazidepotassium-sparing diureticModerate

    Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Triamterene and hydrochlorothiazide label, Warnings)

  • Valsartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy. (Valsartan and hydrochlorothiazide label, Warnings and precautions)

  • VancomycinantibioticModerate

    Combined use of piperacillin and tazobactam and vancomycin may be associated with an increased incidence of acute kidney injury [see Drug Interactions (7.3) ]. (Piperacillin and tazobactam label, Warnings and precautions)

  • Vecuroniumneuromuscular blockerModerate

    Vecuronium Piperacillin when used concomitantly with vecuronium has been implicated in the prolongation of the neuromuscular blockade of vecuronium. (Piperacillin and tazobactam label, Drug interactions)

  • WarfarinanticoagulantModerate

    Monitor coagulation parameters in patients receiving Piperacillin and Tazobactam for Injection and Sodium Chloride Injection and heparin or oral anticoagulants. (Piperacillin and tazobactam label, Drug interactions)

Minor mentions (18)

  • Acetazolamidecarbonic anhydrase inhibitorMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Amiloridepotassium-sparing diureticMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Bumetanideloop diureticMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Chlorothiazidethiazide diureticMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Chlorthalidonethiazide diureticMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Eplerenonealdosterone antagonistMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Erythromycinmacrolide antibioticMinor

    Infants born to women treated during pregnancy with oral erythromycin for early syphilis should be treated with an appropriate penicillin regimen. (Erythromycin label, Warnings)

  • Ethacrynic acidloop diureticMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Furosemideloop diureticMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Indapamidethiazide diureticMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • MeropenemantibioticMinor

    There have been reports of individuals with a history of penicillin hypersensitivity who have experienced severe hypersensitivity reactions when treated with another β-lactam. (Meropenem label, Warnings and precautions)

  • Metolazonethiazide diureticMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Patients who are allergic to penicillin may theoretically have cross-sensitivity to penicillamine. (Penicillamine label, Precautions)

  • Some antibiotics such as penicillin may compete with phenylacetylglutamine and hippurate for active secretion by renal tubules, which may affect the overall disposition of the infused drug. (Sodium phenylacetate and sodium benzoate label, Drug interactions)

  • Spironolactonealdosterone antagonistMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

  • Torsemideloop diureticMinor

    Periodic electrolyte determinations should be performed in patients with low potassium reserves, and the possibility of hypokalemia should be kept in mind with patients who have potentially low potassium reserves and who are receiving cytotoxic therapy or diuretics. (Piperacillin and tazobactam label, Warnings and precautions)

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Not medical advice. Severity reflects the label's wording, not your circumstances. A "major" flag can be routine under supervision and a "minor" one can matter at high doses. Ask a pharmacist.