Sefril (Cephradine): A First-Generation Cephalosporin Antibiotic

Sefril contains Cephradine, a semisynthetic broad-spectrum bactericidal antibiotic. It is a first-generation cephalosporin effective against both Gram-positive and Gram-negative bacteria. Its primary mechanism of action is inhibiting bacterial cell wall synthesis, leading to bacterial lysis. It is used to treat a variety of infections and belongs to the therapeutic class of First-generation Cephalosporins.

How Sefril Works (Pharmacology)

Cephradine's bactericidal action is due to its interference with bacterial cell wall synthesis:

• Cell Wall Inhibition: Cephradine inhibits the cross-linking process of peptidoglycans, which are essential components of the bacterial cell wall.
• Cell Lysis: By preventing the formation of a rigid cell wall, it leads to the creation of a porous cell wall. This makes the bacteria susceptible to external osmotic pressure, causing the bacterial cell to lyse and die.
• Broad Spectrum: It is active against a wide range of bacteria, including many Gram-positive and Gram-negative organisms, as well as penicillinase-producing strains that are resistant to ampicillin.

Key Indications & Benefits

Sefril is indicated for the treatment of infections caused by sensitive bacteria, including:

• Upper respiratory tract infections (URTI): Sinusitis, pharyngitis, tonsillitis, laryngo-tracheo bronchitis, and otitis media.
• Lower respiratory tract infections (LRTI): Acute and chronic bronchitis, lobar pneumonia, and bronchopneumonia.
• Urinary tract infections (UTI): Cystitis, urethritis, and pyelonephritis.
• Skin and soft tissue infections: Abscess, cellulitis, furunculosis, and impetigo.

It is effective against common pathogens like Staphylococci (including penicillin-resistant strains), Streptococcus pyogenes, Streptococcus pneumoniae, Escherichia coli, Klebsiella spp., Proteus mirabilis, and Haemophilus influenzae, among others.

Dosage & Administration

Sefril is available for both oral and injectable administration. Dosage varies depending on the patient's age, infection type, and severity. Always consult a registered physician for specific dosage instructions.

Oral Administration:

• Adults:
  • Urinary tract infections: 500 mg four times daily or 1 g twice daily.
  • Respiratory/Skin/Soft tissue infections: 250 to 500 mg four times daily or 500 mg to 1 g twice daily.
• Children:
  • General: 25 to 50 mg/kg total daily dose, in two or four equally divided doses.
  • Otitis media: 75 to 100 mg/kg total daily dose, in divided doses every 6 to 12 hours.
• Maximum daily dosage: 4 gm.
• Elderly: Normal adult dose is appropriate, but patients with impaired renal or hepatic function should be monitored.

Injectable Administration (IV/IM):

• Adults: 2-4 gm daily in four equally divided doses, up to 8 gm daily in severe cases.
  • Prophylaxis: A single preoperative dose of 1-2 gm intramuscularly or intravenously.
• Children: 50-100 mg/kg daily in four equally divided doses, up to 300 mg/kg daily in severe infection.

Important Considerations & Warnings

It is crucial to discuss your full medical history with your doctor before taking Sefril.

Contraindications:

• Patients with known or suspected hypersensitivity to cephalosporins.

Side Effects:

• Common: Gastrointestinal disturbances, hypersensitivity reactions (more likely in those with a history of allergy, asthma, or hay fever), skin reactions.
• Rare: Glossitis, heartburn, dizziness, tightness in the chest, nausea, vomiting, diarrhea, abdominal pain, vaginitis, candidal overgrowth.
• Serious: Blood disorders (thrombocytopenia, leucopenia), fever, serum sickness-like reactions, anaphylaxis, confusion, sleep disturbances, hyperactivity, transient hepatitis, cholestatic jaundice, reversible interstitial nephritis.

Pregnancy & Lactation:

• Pregnancy: Safety in pregnancy has not been established, although animal studies have not shown teratogenicity.
• Lactation: Cephradine is excreted in breast milk and should be used with caution in nursing mothers.

Precautions & Warnings:

• Hypersensitivity: Administer with care to patients with a hypersensitivity to penicillins due to the risk of cross-sensitivity between beta-lactam antibiotics.
• Superinfection: Prolonged use may lead to superinfection by resistant organisms.
• Coombs' Test: Cephalosporin antibiotics may cause a positive Coombs' test result.
• Urine Glucose Test: May cause a false-positive urine glucose result with Benedict's or Fehling's solutions or Clinitest tablets. This does not occur with enzyme-based tests.
• Renal Impairment: Dosage adjustment is necessary.

Drug Interactions:

• Nephrotoxic drugs (e.g., aminoglycosides) and Diuretics (e.g., furosemide): Concomitant use may increase the risk of kidney damage.
• Probenecid: Enhances the possibility of renal toxicity.

Overdose Effects

• Symptoms: Non-specific, including nausea, vomiting, diarrhea, and gastric upsets.
• Treatment: Primarily supportive. Gastric lavage may be necessary if a large amount has been ingested.

Storage Conditions

• Oral Suspension: Freshly prepared suspension should be used within 7 days at room temperature or 14 days if refrigerated.
• Injection Solution: Use within 2 hours at room temperature, or 12 hours if refrigerated at 5°C. Reconstituted solutions may vary in color, which does not affect potency.
• Keep all medicines out of the reach of children.
• Do not use after the expiry date.