CEFTRINOVA 1GM

Indications

• Bacterial infections
• Susceptible infections due to sensitive Gram-positive and Gram-negative bacteria
• Community-acquired pneumonia
• Hospital-acquired pneumonia
• Intra-abdominal infections
• Complicated urinary tract infections
• Severe diabetic foot infections
• Prophylaxis of infection from human and animal bites

Dosage

Adults: 1–2 g once daily, or 2 g every 8 hours for severe infections or hospital-acquired pneumonia.

Mechanism of action

Ceftriaxone works by inhibiting mucopeptide synthesis in the bacterial cell wall. Its beta-lactam structure binds to carboxypeptidases, endopeptidases, and transpeptidases located in the bacterial cytoplasmic membrane, which are crucial for cell wall synthesis and division. This binding leads to enzyme inactivity, resulting in the formation of defective cell walls and ultimately bacterial cell death.

Pharmacodynamics

Ceftriaxone is a beta-lactam antibiotic with bactericidal properties, primarily affecting the synthesis of bacterial cell walls. It exhibits activity against a variety of Gram-positive and Gram-negative organisms. The drug is stable against hydrolysis by many beta-lactamases, which enhances its effectiveness against resistant bacterial strains. However, it can still be subject to resistance mechanisms such as beta-lactamase production and alterations in penicillin-binding proteins.

Pharmacokinetics

Ceftriaxone has a long half-life, allowing for once-daily dosing in many cases. It is widely distributed in body tissues and fluids, including the central nervous system, making it effective for treating infections such as meningitis. The drug is primarily eliminated via the kidneys, with a portion excreted in the bile. Dose adjustments may be necessary in patients with renal impairment.

Contra-indications

• Hypersensitivity to ceftriaxone or any of its ingredients
• History of severe allergic reactions to penicillins or other beta-lactam antibiotics
• Newborns with hyperbilirubinemia
• Concurrent use with calcium-containing solutions in neonates

Adverse effects

• Diarrhea
• Nausea
• Vomiting
• Rash
• Thrombocytosis
• Thrombophlebitis at the injection site
• Antibiotic-associated colitis
• Acute kidney injury
• Jaundice
• Biliary sludge
• Neurotoxicity (rare, may include seizures)

Interactions

• Calcium-containing solutions (risk of precipitation)
• Probenecid (may increase plasma concentrations of ceftriaxone)
• Anticoagulants (may enhance anticoagulant effect)
• Other nephrotoxic agents (increased risk of renal impairment)

Precautions

• Use with caution in patients with renal impairment
• Caution in patients with hepatic impairment
• Monitor for signs of antibiotic-associated colitis
• Use with caution in patients with a history of gastrointestinal disease

Pregnancy

Not known to be harmful, but should be used only if clearly needed.

Breast-feeding

Present in milk in low concentrations, but generally considered appropriate to use.

Storage

Store in a cool, dry place away from light. Reconstituted solutions should be used immediately or stored at 2-8 degrees Celsius and used within 24 hours.

Formulations

• Powder for solution for injection: 500 mg, 1 g, 2 g vials

Indications

• Surgical instrument sterilization
• Preparation of sterile pharmaceuticals
• Sterilization of medical devices
• Laboratory equipment sterilization
• Maintenance of aseptic conditions in operating rooms

Dosage

Children: Not applicable, as sterilization does not involve drug dosing.

Adults: Not applicable, as sterilization does not involve drug dosing.

Mechanism of action

The mechanism of action for sterilization techniques varies by method. For instance, autoclaving uses steam to denature proteins and disrupt cellular structures, effectively killing microorganisms. Chemical sterilants may act by damaging cellular membranes or interfering with metabolic processes. Radiation methods, such as gamma rays, cause DNA damage in microorganisms, preventing replication.

Pharmacodynamics

Pharmacodynamics in the context of sterilization is not applicable as it primarily pertains to drug action. However, understanding the effectiveness of sterilization methods can be related to the concentration of the agent used, exposure time, and the nature of the microorganisms targeted. The aim is to achieve a sterility assurance level (SAL) that ensures a significant reduction in microbial load.

Pharmacokinetics

Pharmacokinetics is not applicable in the traditional sense for sterilization processes, as they do not involve drug absorption, distribution, metabolism, or excretion. Instead, the effectiveness of a sterilization method is evaluated based on the parameters of the sterilization process itself, including temperature, pressure, time, and the nature of the sterilant used.

Pregnancy

Sterilized products are generally considered safe during pregnancy, but specific formulations should be evaluated for individual safety.

Breast-feeding

Sterilized products are usually safe during breastfeeding; however, it is advisable to consult healthcare professionals regarding specific products.

Storage

Store in a cool, dry place, away from direct sunlight and moisture. Follow specific storage instructions provided by the manufacturer.

Mechanism of action

Ceftriaxone works by inhibiting the mucopeptide synthesis in the bacterial cell wall. The beta-lactam moiety of ceftriaxone binds to carboxypeptidases, endopeptidases, and transpeptidases in the bacterial cytoplasmic membrane. These enzymes are involved in cell-wall synthesis and cell division. Binding of ceftriaxone to these enzymes causes the enzyme to lose activity; therefore, the bacteria produce defective cell walls, causing cell death.

Pharmacodynamics

Ceftriaxone is a cephalosporin/cephamycin beta-lactam antibiotic used in the treatment of bacterial infections caused by susceptible, usually gram-positive, organisms. Ceftriaxone has <i>in vitro</i> activity against gram-positive aerobic, gram-negative aerobic, and anaerobic bacteria. The bactericidal activity of ceftriaxone results from the inhibition of cell wall synthesis and is mediated through ceftriaxone binding to penicillin-binding proteins (PBPs). Ceftriaxone is stable against hydrolysis by a variety of beta-lactamases, including penicillinases, and cephalosporinases and extended-spectrum beta-lactamases. However, resistance to ceftriaxone usually occurs through beta-lactamase hydrolysis, altered PBPs, or reduced bacterial cell permeability. Ceftriaxone should not be mixed with or giving in the same IV line as diluents/products containing calcium as they may cause ceftriaxone to precipitate. Ceftriaxone use may also cause biliary sludge or gallbladder pseudolithiasis.