Eryfast Overview
Eryfast is a broad-spectrum macrolide antibiotic containing erythromycin. It works by binding to the 50S ribosomal subunit of susceptible bacteria, inhibiting protein synthesis and halting bacterial growth (bacteriostatic effect, which can be bactericidal at higher concentrations). Eryfast is widely used as a primary treatment for various bacterial pathogens and serves as an effective alternative for patients with known penicillin allergies.
Primary Medical Indications
Eryfast is indicated for adult and pediatric treatment of mild to moderately severe bacterial infections, including:
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Upper & Lower Respiratory Tract Infections: Acute bronchitis, pneumonia (including atypical pneumonia caused by Mycoplasma pneumoniae), tonsillitis, and pharyngitis.
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Skin & Soft Tissue Infections: Acne vulgaris, folliculitis, erysipelas, and impetigo.
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Eye Infections & Ophthalmia: Chlamydial conjunctivitis and bacterial eye conditions.
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STD & Pelvic Infections: Non-gonococcal urethritis, cervicitis, and chlamydial genital infections.
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Prophylactic Use: Rheumatic fever prevention and endocarditis prophylaxis in penicillin-allergic patients prior to dental or surgical procedures.
Key Product Specifications & Dosing Forms
| Feature | Specification |
| Active Ingredient | Erythromycin (as Stearate, Ethylsuccinate, or base) |
| Pharmacological Class | Macrolide Antibiotic |
| Available Formulations | Film-coated tablets, capsules, oral suspension, topical gel/solution |
| Common Strengths | 250 mg, 500 mg tablets; 125 mg/5ml, 250 mg/5ml suspension |
| Administration | Oral tablets should generally be taken on an empty stomach with a full glass of water (1 hour before or 2 hours after meals); take with food if stomach upset occurs |
Important Safety & Administration Guidelines
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Drug Interaction Risk: Erythromycin is a potent inhibitor of the CYP3A4 liver enzyme. Avoid co-administration with statins, ergot alkaloids, pimozide, or certain antiarrhythmics due to risks of increased drug toxicity or QT prolongation.
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Penicillin Allergy Alternative: Excellent alternative option for individuals diagnosed with type 1 penicillin or beta-lactam hypersensitivity.
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Gastrointestinal Tolerability: Abdominal cramping, nausea, vomiting, and diarrhea are common side effects; taking specified formulations (like ethylsuccinate) or taking doses alongside light meals can help reduce stomach discomfort.
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Complete the Full Duration: Patients must finish the complete course of therapy to prevent bacterial recurrence and minimize the risk of antibiotic resistance.
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