Tazocin

Oral Antibiotics

Drug class: Extended-Spectrum Penicillin; specifically combining a semisynthetic penicillin (piperacillin) with a β-lactamase inhibitor (tazobactam) to enhance its effectiveness against resistant bacteria.

Tazocin (中文：達比黴素)

Common Strengths

Tazocin is available in the following common strengths:

• 2.25 g (2 g piperacillin and 0.25 g tazobactam)
• 4.5 g (4 g piperacillin and 0.5 g tazobactam)

Drug Usages

Tazocin is indicated for the treatment of:

• Lower respiratory tract infections
• Urinary tract infections (complicated and uncomplicated)
• Intra-abdominal infections
• Skin and skin structure infections
• Bacterial septicemia
• Polymicrobial infections

Mechanism of Action

Piperacillin inhibits bacterial cell wall synthesis through binding to penicillin-binding proteins (PBPs), while tazobactam inhibits β-lactamase enzymes that can render piperacillin ineffective. This combination broadens the spectrum of activity against both gram-positive and gram-negative bacteria.

Route of Administration

Tazocin is administered intravenously (IV).

Dosages

General dosing for adults typically involves:

• 3.375 g every 6 hours or 4.5 g every 6 hours for more severe infections.

Renal Dosing:

• Adjustments are necessary based on the estimated Glomerular Filtration Rate (eGFR):
  • eGFR >40 mL/min: standard dosing
  • eGFR 20-40 mL/min: reduce frequency to every 8 hours
  • eGFR <20 mL/min: consult guidelines for specific dosing adjustments

Side Effects

Frequency	Adverse reactions
Common Side Effects	Nausea
	Vomiting
	Diarrhea
	Rash
	Headache
	Insomnia
Serious Side Effects	Anaphylaxis
	Severe skin reactions (e.g. Stevens-Johnson syndrome)
	Pseudomembranous colitis
	Hemolytic anemia
	Renal impairment

Pharmacokinetics

• Onset of Action: Typically within 30 minutes after IV administration.
• Duration of Action: Approximately 6 to 8 hours.

Drug Precautions

Pregnancy

Use only if needed; potential risks should be discussed with a healthcare provider.

Breastfeeding

Caution is advised; consult healthcare providers regarding risks versus benefits.

Children and Elderly

Use in children under two years should be under strict medical supervision. Elderly patients may require dosage adjustments due to renal function considerations.

Monitoring Items

Regular monitoring of renal function, liver enzymes, and complete blood counts is recommended during therapy.

Drug Interactions

• Warfarin: May increase the risk of bleeding.
• Doxycycline: Can decrease the effectiveness of piperacillin due to pharmacodynamic antagonism, as bacteriostatic agents can inhibit bactericidal agents.
• Azithromycin: Similar to doxycycline, it may reduce the effects of piperacillin through pharmacodynamic antagonism.
• Vancomycin: Co-administration can increase toxicity; kidney function should be monitored.
• Probenecid: This can increase levels of piperacillin by competing for renal clearance.

FAQ

How Should I Take Tazocin?

Tazocin is administered as an IV infusion.

What Should I Avoid During Treatment?

Avoid using over-the-counter medications for diarrhea unless advised by a healthcare provider, as it may mask symptoms of a serious condition.