1. Clinical Overview
A fixed-dose combination topical preparation containing a corticosteroid (Beclometasone dipropionate), an antifungal (Clotrimazole), and an aminoglycoside antibiotic (Gentamicin sulfate). It is primarily indicated for the treatment of mixed dermatological infections where inflammation, fungal infection, and bacterial infection coexist, commonly seen in tropical climates like India. It provides anti-inflammatory, antifungal, and antibacterial actions in a single application.
| Onset | Duration | Bioavailability |
|---|---|---|
| Anti-inflammatory effects begin within a few hours; antifungal and antibacterial effects start upon contact. | Topical effect lasts 8-12 hours per application. Systemic effects are minimal due to low percutaneous absorption. | Topical bioavailability is variable and site-dependent. Systemic absorption is generally low (<5%) on intact skin but can increase significantly on inflamed, broken skin, or under occlusive dressings. |
2. Mechanism of Action
The combination works via three distinct mechanisms: 1) Beclometasone suppresses inflammation by inhibiting phospholipase A2, reducing prostaglandin and leukotriene synthesis, and stabilizing lysosomal membranes. 2) Clotrimazole disrupts fungal cell membrane integrity by inhibiting the synthesis of ergosterol, a key component. 3) Gentamicin is bactericidal, inhibiting bacterial protein synthesis by binding irreversibly to the 30S ribosomal subunit.
3. Indications & Uses
- Infected eczema (bacterial and/or fungal)
- Infected seborrheic dermatitis
- Intertrigo with secondary bacterial and/or candidal infection
- Tinea cruris/corporis with secondary infection
- Dermatitis with superimposed infection
4. Dosage & Administration
Adult Dosage: Apply a thin layer to the affected area 2 to 3 times daily, or as directed by the physician. Duration should not exceed 2-4 weeks continuously.
Administration: 1. Wash and dry the affected area gently. 2. Take a small amount on clean fingertips. 3. Apply a thin film and rub in gently until it disappears. 4. Wash hands after application unless hands are the treatment site. 5. Do not cover with occlusive dressings unless specifically advised. 6. Do not use for longer than prescribed.
5. Side Effects
Common side effects may include:
- Local burning or stinging sensation
- Itching (pruritus)
- Dryness of skin
- Erythema (redness)
- Skin irritation
6. Drug Interactions
| Drug | Effect | Severity |
|---|---|---|
| Other Topical Corticosteroids | Additive risk of skin atrophy and systemic side effects. | Major |
| Other Aminoglycosides (Systemic e.g., Amikacin) | Increased risk of ototoxicity and nephrotoxicity. | Major |
| Loop Diuretics (e.g., Furosemide) | Potentiates the ototoxic risk of Gentamicin. | Moderate |
| Neuromuscular Blocking Agents (e.g., Succinylcholine) | Gentamicin may potentiate neuromuscular blockade. | Moderate |
| Amphotericin B, Vancomycin (Systemic) | Increased nephrotoxic risk with Gentamicin absorption. | Moderate |
7. Patient Counselling
- DO use exactly as prescribed by your doctor.
- DO wash and dry the area before application.
- DO use a thin layer; more is not better.
- DO wash your hands after applying (unless treating hands).
- DON'T use it on your face, groin, or armpits unless directed.
- DON'T cover the area with tight bandages or plastic wraps unless told.
- DON'T use it for longer than the prescribed period (usually 2-4 weeks).
- DON'T share this medicine with others.
8. Toxicology & Storage
Overdose: Topical: Severe local skin reactions, increased risk of systemic side effects (as listed). Accidental Ingestion: Nausea, vomiting, GI distress. Systemic Gentamicin toxicity: Vertigo, tinnitus, hearing loss, renal impairment.
Storage: Store at room temperature (15-25°C), protected from light and moisture. Do not freeze. Keep the tube tightly closed. Keep out of reach of children. Do not use after the expiry date printed on the pack.