Dexamethasone Sodium Phosphate

DEXAMETHASONE SODIUM PHOSPHATE- dexamethasone sodium phosphate solution/ drops
REMEDYREPACK INC.

DESCRIPTION

Dexamethasone sodium phosphate ophthalmic solution is a clear, colorless to pale yellow topical steroid solution for ophthalmic or otic administration.

Glucocorticoids are adrenocortical steroids, both naturally occurring and synthetic. Dexamethasone is a synthetic analog of naturally occurring glucocorticoids (hydrocortisone and cortisone). Dexamethasone sodium phosphate is a water soluble, inorganic ester of dexamethasone. It is approximately three thousand times more soluble in water at 25°C than hydrocortisone.

Dexamethasone Sodium Phosphate (structural formula)
(click image for full-size original)

C 22 H 28 FNa 2 O 8 P

Mol. wt. 516.41

Chemical Name: 9-fluoro-11β, 17-dihydroxy-16α-methyl-21-[phosphonooxy]pregna-1,4-diene-3, 20-dione disodium salt.

Each mL contains: Active: Dexamethasone Sodium Phosphate [equivalent to 1 mg (0.1%) Dexamethasone Phosphate]. Inactives: Sodium Citrate, Sodium Borate, Creatinine, Polysorbate 80, Edetate Disodium Dihydrate, Purified Water. Hydrochloric Acid may be added to adjust pH (6.6- 7.8). Preservatives Added: Sodium Bisulfite 0.1%, Phenylethyl Alcohol 0.25%, Benzalkonium Chloride 0.02%.

CLINICAL PHARMACOLOGY

Dexamethasone sodium phosphate suppresses the inflammatory response to a variety of agents and it probably delays or slows healing. No generally accepted explanation of these steroid properties has been advanced.

INDICATIONS AND USAGE

For the treatment of the following conditions:

Ophthalmic: Steroid responsive 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 keratitis, iritis, cyclitis, selected infective conjunctivitis when the inherent hazard of steroid use is accepted to obtain an advisable diminution in edema and inflammation; corneal injury from chemical or thermal burns, or penetration of foreign bodies.

Otic: Steroid responsive inflammatory conditions of the external auditory meatus, such as allergic otitis externa, selected purulent and nonpurulent infective otitis externa when the hazard of steroid use is accepted to obtain an advisable diminution in edema and inflammation.

CONTRAINDICATIONS

Epithelial herpes simplex keratitis (dendritic keratitis). Acute infectious stages of vaccinia, varicella, and many other viral diseases of the cornea and conjunctiva.

Mycobacterial infection of the eye.

Fungal diseases of ocular or auricular structures.

Hypersensitivity to any component of this product, including sulfites (see WARNINGS).

Perforation of a drum membrane.

WARNINGS

Prolonged use may result in ocular hypertension and/or glaucoma, with damage to the optic nerve, defects in visual acuity and fields of vision, and posterior subcapsular cataract formation. Prolonged use may suppress the host response and thus increase the hazard of secondary ocular infections. In those diseases causing thinning of the cornea or sclera, perforations have been known to occur with the use of topical corticosteroids. In acute purulent conditions of the eye or ear, corticosteroids may mask infection or enhance existing infection. If these products are used for 10 days or longer, intraocular pressure should be routinely monitored even though it may be difficult in children and uncooperative patients.

Employment of corticosteroid medication in the treatment of herpes simplex other than epithelial herpes simplex keratitis, in which it is contraindicated, requires great caution; periodic slit-lamp microscopy is essential.

This product contains sodium bisulfite, a sulfite that may cause allergic-type reactions including anaphylactic symptoms and life-threatening or less severe asthmatic episodes in certain susceptible people. The overall prevalence of sulfite sensitivity in the general population is unknown and probably low. Sulfite sensitivity is seen more frequently in asthmatic than in nonasthmatic people.

PRECAUTIONS

General:

The possibility of persistent fungal infections of the cornea should be considered after prolonged corticosteroid dosing.

There have been reports of bacterial keratitis associated with the use of multiple dose containers of topical ophthalmic products. These containers had been inadvertently contaminated by patients who, in most cases, had a concurrent corneal disease or a disruption of the ocular epithelial surface. (See PRECAUTIONS, Information for Patients).

Information for Patients:

Patients should be instructed to avoid allowing the tip of the dispensing container to contact the eye or surrounding structures.

Patients should also be instructed that ocular solutions, if handled improperly, can become contaminated by common bacteria known to cause ocular infections. Serious damage to the eye and subsequent loss of vision may result from using contaminated solutions. (See PRECAUTIONS, General).

Patients should also be advised that if they develop an intercurrent ocular condition (e.g., trauma, ocular surgery or infection), they should immediately seek their physician’s advice concerning the continued use of the present multidose container.

One of the preservatives in dexamethasone sodium phosphate ophthalmic solution, benzalkonium chloride, may be absorbed by soft contact lenses. Patients wearing soft contact lenses should be instructed to wait at least 15 minutes after instilling dexamethasone sodium phosphate ophthalmic solution before they insert their lenses.

Carcinogenesis, Mutagenesis, Impairment of Fertility

Long-term animal studies have not been performed to evaluate the carcinogenic potential or the effect on fertility of dexamethasone sodium phosphate ophthalmic solution.

Pregnancy

Pregnancy Category C: Dexamethasone has been shown to be teratogenic in mice and rabbits following topical ophthalmic application in multiples of the therapeutic dose.

In the mouse, corticosteroids produce fetal resorptions and a specific abnormality, cleft palate. In the rabbit, corticosteroids have produced fetal resorptions and multiple abnormalities involving the head, ears, limbs, palate, etc.

There are no adequate or well-controlled studies in pregnant women. Dexamethasone sodium phosphate ophthalmic solution should be used during pregnancy only if the potential benefit to the mother justifies the potential risk to the embryo or fetus. Infants born of mothers who have received substantial doses of corticosteroids during pregnancy should be observed carefully for signs of hypoadrenalism.

Nursing Mothers

Topically applied steroids are absorbed systemically. Therefore, because of the potential for serious adverse reactions in nursing infants from dexamethasone sodium phosphate, a decision should be made whether to discontinue nursing or discontinue the drug, taking into account the importance of the drug to the mother.

Pediatric Use

Safety and effectiveness in pediatric patients have not been established.

Geriatric Use

No overall differences in safety and effectiveness have been observed between elderly and younger patients.

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