Third-generation cephalosporin antibiotic: Class Overview and Comparison
Quick answer: Third-generation cephalosporin antibiotic are a class of medicines used for specific therapeutic indications. iMedic covers 7 third-generation cephalosporin antibiotic substances. Below is a comparison table linking to detailed pages for each.
Third-generation cephalosporin antibiotic on iMedic (7 substances)
| Substance | Primary indications | Mechanism | Common dose |
|---|---|---|---|
| Cefixime | Urinary tract infections, Otitis media | Inhibits bacterial cell wall synthesis via binding to penicillin-binding protein | 400 mg once daily or 200 mg twice daily |
| Cefotaxim | Meningitis, Pneumonia | Inhibits bacterial cell wall synthesis via binding to penicillin-binding protein | 1-2 g IV/IM every 6-12 hours |
| Cefotaxim Mip | Meningitis, Pneumonia | Inhibits bacterial cell wall synthesis with broad gram-negative coverage (cefota | 1-2 g IV/IM every 6-12 hours |
| Ceftazidim | Pseudomonas infections, Hospital-acquired pneumonia | Inhibits bacterial cell wall synthesis with strong activity against Pseudomonas | 1-2 g IV/IM every 8-12 hours |
| Ceftriaxon | Meningitis, Gonorrhea | Inhibits bacterial cell wall synthesis via penicillin-binding proteins, with lon | 1-2 g IV/IM once daily |
| Ceftriaxon Mip | Bacterial infections, Meningitis | Beta-lactam antibiotic inhibiting bacterial cell wall synthesis by binding penic | 1-2 g IV/IM once daily |
| Fortum | Severe gram-negative infections, Pseudomonas infections | Ceftazidime — beta-lactam antibiotic that inhibits bacterial cell wall synthesis | 1-2 g IV/IM every 8-12 hours |
About Third-generation cephalosporin antibiotic
Third-generation cephalosporin antibiotic share a common mechanism of action and clinical use. Specific dosing, side effects, contraindications, and drug interactions vary between individual substances within the class. Click any substance above for full prescribing information and patient guidance.
Common considerations across the class
- Indication-specific selection: Different members may be preferred for different conditions or patient populations
- Dose equivalence: Members of the same class are not always interchangeable on a 1:1 dose basis
- Drug interactions: Class members often share interaction profiles (e.g., CYP enzyme effects) but individual variation matters
- Side effects: Some side effects are class-wide; others are substance-specific
- Contraindications: Individual contraindications may not generalize across the class
Always consult the prescribing information for the specific medicine prescribed and discuss with your clinician.
Frequently asked questions
What are Third-generation cephalosporin antibiotic?
Third-generation cephalosporin antibiotic are medicines that share a common mechanism of action used for specific therapeutic indications. iMedic currently covers 7 substances in this class with detailed pages for each.
Are all Third-generation cephalosporin antibiotic interchangeable?
No. While medicines in the same class share a mechanism, they differ in potency, dosing, drug interactions, and tolerability. Switching between them is a clinical decision based on individual response, side effects, and treatment goals.
How do I choose between different Third-generation cephalosporin antibiotic?
Selection depends on the specific clinical indication, patient factors (age, comorbidities, kidney/liver function, other medications), tolerability of side effects, cost, and clinician preference. This is a prescribing decision.
Are Third-generation cephalosporin antibiotic available as generics?
Most well-established class members are available as generic alternatives, often substantially less expensive than brand-name versions while clinically equivalent. Newer members may still be brand-only.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.