What it's for (Indications)
- This ophthalmic preparation, combining phenylephrine, prednisolone, and sulphacetamide, is indicated for the treatment of steroid-responsive inflammatory ocular conditions for which a corticosteroid is indicated and where superficial bacterial ocular infection or a risk of bacterial ocular infection exists.
- Specific conditions may include chronic anterior uveitis, injury to the cornea from chemical, radiation, or thermal burns, or penetration of foreign bodies.
- It is also used in inflammatory conditions of the palpebral and bulbar conjunctiva, cornea, and anterior segment of the globe, such as allergic conjunctivitis, acne rosacea, superficial punctate keratitis, herpes zoster ophthalmicus, iritis, cyclitis, selected infective conjunctivitides when the inherent hazard of steroid use is accepted to obtain a diminution in edema and inflammation, and other conjunctivitis types.
- The antibacterial component helps prevent or treat susceptible bacterial infections.
Dosage Information
| Type | Guideline |
|---|---|
| Standard | For ophthalmic use only, this medication should be administered under the direct supervision of a healthcare professional. The typical dosage involves instilling one or two drops into the conjunctival sac of the affected eye(s) two to four times daily. During the initial 24 to 48 hours, the dosage may be safely increased to one or two drops every hour, if clinically indicated. Care should be taken to avoid contamination of the dropper tip by not touching the eye or any other surface with the tip. Treatment should not be discontinued prematurely; a full course, as prescribed by the ophthalmologist, is essential to achieve optimal therapeutic results and prevent recurrence or development of resistance. Prolonged use without medical supervision is strongly discouraged due to the potential for serious ocular side effects. |
Safety & Warnings
Common Side Effects
- Ocular side effects associated with this combination can include elevation of intraocular pressure (IOP) with possible development of glaucoma, optic nerve damage, posterior subcapsular cataract formation, and delayed wound healing.
- Other local reactions may manifest as transient stinging, burning, itching, or irritation upon instillation.
- Allergic reactions to the sulfonamide component, though rare with topical application, can be severe and include Stevens-Johnson syndrome, toxic epidermal necrolysis, or anaphylaxis.
- Secondary infections, particularly fungal and viral infections of the eye, may be exacerbated or masked by the corticosteroid component.
- Mydriasis (pupil dilation) and conjunctival hyperemia due to phenylephrine are common, and systemic effects such as headache, palpitations, or increased blood pressure are rare but possible with significant systemic absorption, especially in children or compromised eyes.
- Visual disturbances, including blurred vision, have also been reported.
Serious Warnings
- Black Box Warning: Serious Warnings: This product, containing a corticosteroid and a sulfonamide antibiotic, carries significant risks if not used appropriately. Prolonged use of ocular corticosteroids can lead to elevated intraocular pressure (IOP), potentially resulting in glaucoma with damage to the optic nerve, defects in visual acuity and fields of vision, and formation of posterior subcapsular cataracts. This risk is particularly elevated in susceptible individuals. The corticosteroid component can also suppress the host immune response, increasing the susceptibility to and exacerbation of secondary ocular infections, including fungal, viral (e.g., herpes simplex), and bacterial infections. Fungal infections of the cornea are notoriously difficult to diagnose and can be significantly worsened by steroid use. Hypersensitivity reactions to sulfonamides, although rare with topical ophthalmic use, can be severe and potentially life-threatening, including Stevens-Johnson syndrome and toxic epidermal necrolysis. Patients should be advised to seek immediate medical attention if signs of severe allergic reaction, persistent ocular discomfort, or changes in vision occur. Regular ophthalmological examination, including measurement of IOP, is strongly recommended during prolonged therapy.
- Prolonged use of ophthalmic corticosteroids may lead to serious ocular complications, including increased intraocular pressure (IOP) leading to glaucoma with damage to the optic nerve, defects in visual acuity and fields of vision, and posterior subcapsular cataract formation.
- Additionally, prolonged corticosteroid use can suppress the host immune response and thus increase the hazard of secondary ocular infections, particularly from fungi and viruses.
- Acute purulent infections of the eye may be masked or enhanced by the presence of corticosteroid medication.
- Fungal infections of the cornea are particularly prone to development coincidentally with long-term steroid application; therefore, fungal invasion should be considered in any persistent corneal ulceration where a steroid has been used or is in use.
- Hypersensitivity reactions, including photosensitivity, to sulphacetamide may occur, and cross-sensitivity with other sulfonamide derivatives is possible.
- Phenylephrine may cause pupillary dilation, which can precipitate angle-closure glaucoma in individuals with a narrow anterior chamber angle.
How it Works (Mechanism of Action)
This combination ophthalmic solution exerts its therapeutic effects through three distinct mechanisms. Prednisolone, a potent synthetic corticosteroid, reduces inflammation by inhibiting the release of arachidonic acid from phospholipids, thereby suppressing the synthesis of prostaglandins and leukotrienes. It also stabilizes lysosomal membranes, reduces capillary permeability, and inhibits the migration of inflammatory cells. Sulphacetamide is a sulfonamide antibiotic that exerts bacteriostatic action by competitively inhibiting the enzyme dihydropteroate synthase, an enzyme critical for the synthesis of folic acid in susceptible bacteria. Folic acid is essential for bacterial growth and replication, thus its inhibition prevents bacterial proliferation. Phenylephrine is an alpha-1 adrenergic agonist that causes vasoconstriction of superficial ocular blood vessels, reducing conjunctival redness and swelling. It also induces mydriasis (pupil dilation) by stimulating the dilator muscle of the iris.
Commercial Brands (Alternatives)
No other brands found for this formula.