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Dexamethasone Sodium Phosphate
Overview
What is ReadySharp Dexamethasone?
Dexamethasone sodium phosphate, a synthetic adrenocortical steroid, is a white or slightly yellow crystalline powder. It is freely soluble in water and is exceedingly hygroscopic. The molecular weight is 516.41. It is designated chemically as 9-fluoro-11β,17-dihydroxy-16α-methyl-21-(phosphonooxy)pregna-1,4-diene-3, 20-dione disodium salt.
The molecular formula is: C
H
FNa
O
P and the structural formula is:
Dexamethasone Sodium Phosphate Injection is a sterile solution of dexamethasone sodium phosphate for intravenous and intramuscular use. The 4 mg/mL strength may also be used for intra-articular, intralesional and soft tissue administration.
Each mL of Dexamethasone Sodium Phosphate Injection 4 mg/mL contains dexamethasone sodium phosphate, equivalent to 4 mg dexamethasone phosphate or 3.33 mg dexamethasone. Inactive ingredients per mL: 1 mg sodium sulfite anhydrous, 19.4 mg sodium citrate anhydrous and 10.42 mg (0.01 mL) benzyl alcohol (preservative) in Water for Injection.
Each mL of Dexamethasone Sodium Phosphate Injection 10 mg/mL contains dexamethasone sodium phosphate, equivalent to 10 mg dexamethasone phosphate or 8.33 mg dexamethasone. Inactive ingredients per mL: 1.5 mg sodium sulfite anhydrous, 16.5 mg sodium citrate anhydrous and 10.42 mg (0.01 mL) benzyl alcohol (preservative) in Water for Injection.
The pH of both concentrations is 7.0-8.5; sodium hydroxide and/or citric acid used, if needed, for pH adjustment. Sealed under nitrogen.
What does ReadySharp Dexamethasone look like?
What are the available doses of ReadySharp Dexamethasone?
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What should I talk to my health care provider before I take ReadySharp Dexamethasone?
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How should I use ReadySharp Dexamethasone?
1. ENDOCRINE DISORDERS
Primary or secondary adrenocortical insufficiency (hydrocortisone or cortisone is the drug of choice; synthetic analogs may be used in conjunction with mineralocorticoids where applicable; in infancy, mineralocorticoid supplementation is of particular importance)
Acute adrenocortical insufficiency (hydrocortisone or cortisone is the drug of choice; mineralocorticoid supplementation may be necessary, particularly when synthetic analogs are used)
Preoperatively, and in the event of serious trauma or illness, in patients with known adrenal insufficiency or when adrenocortical reserve is doubtful
Shock unresponsive to conventional therapy if adrenocortical insufficiency exists or is suspected
Congenital adrenal hyperplasia
Nonsuppurative thyroiditis
Hypercalcemia associated with cancer
2. RHEUMATIC DISORDERS
As adjunctive therapy for short-term administration (to tide the patient over an acute episode or exacerbation) in:
Post-traumatic osteoarthritis
Synovitis of osteoarthritis
Rheumatoid arthritis, including juvenile rheumatoid arthritis (selected cases may require low-dose maintenance therapy)
Acute and subacute bursitis
Epicondylitis
Acute nonspecific tenosynovitis
Acute gouty arthritis
Psoriatic arthritis
Ankylosing spondylitis
3. COLLAGEN DISEASES
During an exacerbation or as maintenance therapy in selected cases of:
Systemic lupus erythematosus
Acute rheumatic carditis
4. DERMATOLOGIC DISEASES
Pemphigus
Severe erythema multiforme (Stevens-Johnson syndrome)
Exfoliative dermatitis
Bullous dermatitis herpetiformis
Severe seborrheic dermatitis
Severe psoriasis
Mycosis fungoides
5. ALLERGIC STATES
Control of severe or incapacitating allergic conditions intractable to adequate trials of conventional treatment in:
Bronchial asthma
Contact dermatitis
Atopic dermatitis
Serum sickness
Seasonal or perennial allergic rhinitis
Drug hypersensitivity reactions
Urticarial transfusion reactions
Acute noninfectious laryngeal edema (epinephrine is the drug of first choice)
6. OPHTHALMIC DISEASES
Severe acute and chronic allergic and inflammatory processes involving the eye, such as:
Herpes zoster ophthalmicus
Iritis, iridocyclitis
Chorioretinitis
Diffuse posterior uveitis and choroiditis
Optic neuritis
Sympathetic ophthalmia
Anterior segment inflammation
Allergic conjunctivitis
Keratitis
Allergic corneal marginal ulcers
7. GASTROINTESTINAL DISEASES
To tide the patient over a critical period of the disease in:
Ulcerative colitis (Systemic therapy)
Regional enteritis (Systemic therapy)
8. RESPIRATORY DISEASES
Symptomatic sarcoidosis
Berylliosis
Fulminating or disseminated pulmonary tuberculosis when used concurrently with appropriate antituberculous chemotherapy
Loeffler's syndrome not manageable by other means
Aspiration pneumonitis
9. HEMATOLOGIC DISORDERS
Acquired (autoimmune) hemolytic anemia
Idiopathic thrombocytopenic purpura in adults (IV only; IM administration is contraindicated)
Secondary thrombocytopenia in adults
Erythroblastopenia (RBC anemia)
Congenital (erythroid) hypoplastic anemia
10. NEOPLASTIC DISEASES
For palliative management of:
Leukemias and lymphomas in adults
Acute leukemia of childhood
11. EDEMATOUS STATES
To induce diuresis or remission of proteinuria in the nephrotic syndrome, without uremia, of the idiopathic type, or that due to lupus erythematosus
12. MISCELLANEOUS
Tuberculous meningitis with subarachnoid block or impending block when used concurrently with appropriate antituberculous chemotherapy
Trichinosis with neurologic or myocardial involvement
13. DIAGNOSTIC TESTING OF ADRENOCORTICAL HYPERFUNCTION
14. CEREBRAL EDEMA associated with primary or metastatic brain tumor, craniotomy or head injury. Use in cerebral edema is not a substitute for careful neurosurgical evaluation and definitive management such as neurosurgery or other specific therapy.
Dexamethasone Sodium Phosphate Injection, 4 mg/mL-
Dexamethasone Sodium Phosphate Injection, 10 mg/mL-
Dexamethasone Sodium Phosphate Injection can be given directly from the vial or it can be added to Sodium Chloride Injection or Dextrose Injection and administered by intravenous drip.
Solutions used for intravenous administration or further dilution of this product should be preservative-free when used in the neonate, especially the premature infant.
When it is mixed with an infusion solution, sterile precautions should be observed. Since infusion solutions generally do not contain preservatives, mixtures should be used within 24 hours.
DOSAGE REQUIREMENTS ARE VARIABLE AND MUST BE INDIVIDUALIZED ON THE BASIS OF THE DISEASE AND THE RESPONSE OF THE PATIENT.
What interacts with ReadySharp Dexamethasone?
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What are the warnings of ReadySharp Dexamethasone?
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What are the precautions of ReadySharp Dexamethasone?
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What are the side effects of ReadySharp Dexamethasone?
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What should I look out for while using ReadySharp Dexamethasone?
Systemic fungal infections (see
regarding amphotericin B).
Hypersensitivity to any component of this product, including sulfites (see
).
What might happen if I take too much ReadySharp Dexamethasone?
Reports of acute toxicity and/or death following overdosage of glucocorticoids are rare. In the event of overdosage, no specific antidote is available; treatment is supportive and symptomatic.
The oral LD
of dexamethasone in female mice was 6.5 g/kg. The intravenous LD
of dexamethasone sodium phosphate in female mice was 794 mg/kg.
How should I store and handle ReadySharp Dexamethasone?
Store in the closed original carton to protect from light until ready for injection. Store in a refrigerator between 2°C to 8°C (36°F to 46°F). Do not freeze. Discard if frozen. Once removed from the refrigerator, PLEGRIDY should be allowed to warm to room temperature (about 30 minutes) prior to injection. Do not use external heat sources such as hot water to warm PLEGRIDY. If refrigeration is unavailable, PLEGRIDY may be stored between 2°C to 25°C (36°F to 77°F) for a period up to 30 days, protected from light. PLEGRIDY can be removed from, and returned to, a refrigerator if necessary. The total combined time out of refrigeration, within a temperature range of 2°C to 25°C (36°F to 77°F), should not exceed 30 days. Store in the closed original carton to protect from light until ready for injection. Store in a refrigerator between 2°C to 8°C (36°F to 46°F). Do not freeze. Discard if frozen. Once removed from the refrigerator, PLEGRIDY should be allowed to warm to room temperature (about 30 minutes) prior to injection. Do not use external heat sources such as hot water to warm PLEGRIDY. If refrigeration is unavailable, PLEGRIDY may be stored between 2°C to 25°C (36°F to 77°F) for a period up to 30 days, protected from light. PLEGRIDY can be removed from, and returned to, a refrigerator if necessary. The total combined time out of refrigeration, within a temperature range of 2°C to 25°C (36°F to 77°F), should not exceed 30 days. Store in the closed original carton to protect from light until ready for injection. Store in a refrigerator between 2°C to 8°C (36°F to 46°F). Do not freeze. Discard if frozen. Once removed from the refrigerator, PLEGRIDY should be allowed to warm to room temperature (about 30 minutes) prior to injection. Do not use external heat sources such as hot water to warm PLEGRIDY. If refrigeration is unavailable, PLEGRIDY may be stored between 2°C to 25°C (36°F to 77°F) for a period up to 30 days, protected from light. PLEGRIDY can be removed from, and returned to, a refrigerator if necessary. The total combined time out of refrigeration, within a temperature range of 2°C to 25°C (36°F to 77°F), should not exceed 30 days. Dexamethasone Sodium Phosphate Injection, USP is available in the following packages:4 mg/mL 10 mg/mL Dexamethasone Sodium Phosphate Injection, USP is available in the following packages:4 mg/mL 10 mg/mL Dexamethasone Sodium Phosphate Injection, USP is available in the following packages:4 mg/mL 10 mg/mL
Clinical Information
Chemical Structure
No Image foundClinical Pharmacology
Dexamethasone sodium phosphate injection has a rapid onset but short duration of action when compared with less soluble preparations. Because of this, it is suitable for the treatment of acute disorders responsive to adrenocortical steroid therapy.
Naturally occurring glucocorticoids (hydrocortisone and cortisone), which also have salt-retaining properties, are used as replacement therapy in adrenocortical deficiency states. Their synthetic analogs, including dexamethasone, are primarily used for their potent anti-inflammatory effects in disorders of many organ systems.
Glucocorticoids cause profound and varied metabolic effects. In addition, they modify the body's immune responses to diverse stimuli.
At equipotent anti-inflammatory doses, dexamethasone almost completely lacks the sodium-retaining property of hydrocortisone and closely related derivatives of hydrocortisone.
Non-Clinical Toxicology
Systemic fungal infections (see regarding amphotericin B).Hypersensitivity to any component of this product, including sulfites (see ).
This product, like many other steroid formulations, is sensitive to heat. Therefore, it should not be autoclaved when it is desirable to sterilize the exterior of the vial.
Following prolonged therapy, withdrawal of corticosteroids may result in symptoms of the corticosteroid withdrawal syndrome including fever, myalgia, arthralgia and malaise. This may occur in patients even without evidence of adrenal insufficiency.
There is an enhanced effect of corticosteroids in patients with hypothyroidism and in those with cirrhosis.
Corticosteroids should be used cautiously in patients with ocular herpes simplex for fear of corneal perforation.
The lowest possible dose of corticosteroid should be used to control the condition under treatment, and when reduction in dosage is possible, the reduction must be gradual.
Psychic derangements may appear when corticosteroids are used, ranging from euphoria, insomnia, mood swings, personality changes and severe depression to frank psychotic manifestations. Also, existing emotional instability or psychotic tendencies may be aggravated by corticosteroids.
Aspirin should be used cautiously in conjunction with corticosteroids in hypoprothrombinemia.
Steroids should be used with caution in nonspecific ulcerative colitis, if there is a probability of impending perforation, abscess, or other pyogenic infection, also in diverticulitis, fresh intestinal anastomoses, active or latent peptic ulcer, renal insufficiency, hypertension, osteoporosis and myasthenia gravis. Signs of peritoneal irritation following gastrointestinal perforation in patients receiving large doses of corticosteroids may be minimal or absent. Fat embolism has been reported as a possible complication of hypercortisonism.
When large doses are given, some authorities advise that antacids be administered between meals to help prevent peptic ulcer.
Growth and development of infants and children on prolonged corticosteroid therapy should be carefully followed.
Steroids may increase or decrease motility and number of spermatozoa in some patients.
Phenytoin, phenobarbital, ephedrine and rifampin may enhance the metabolic clearance of corticosteroids resulting in decreased blood levels and lessened physiologic activity, thus requiring adjustment in corticosteroid dosage. These interactions may interfere with dexamethasone suppression tests which should be interpreted with caution during administration of these drugs.
False negative results in the dexamethasone suppression test (DST) in patients being treated with indomethacin have been reported. Thus, results of the DST should be interpreted with caution in these patients.
The prothrombin time should be checked frequently in patients who are receiving corticosteroids and coumarin anticoagulants at the same time because of reports that corticosteroids have altered the response to these anticoagulants. Studies have shown that the usual effect produced by adding corticosteroids is inhibition of response to coumarins, although there have been some conflicting reports of potentiation not substantiated by studies.
When corticosteroids are administered concomitantly with potassium-depleting diuretics, patients should be observed closely for development of hypokalemia.
Intra-articular injection of a corticosteroid may produce systemic as well as local effects.
Appropriate examination of any joint fluid present is necessary to exclude a septic process.
A marked increase in pain accompanied by local swelling, further restriction of joint motion, fever and malaise is suggestive of septic arthritis. If this complication occurs and the diagnosis of sepsis is confirmed, appropriate antimicrobial therapy should be instituted.
Injection of a steroid into an infected site is to be avoided.
Corticosteroids should not be injected into unstable joints.
Patients should be impressed strongly with the importance of not overusing joints in which symptomatic benefit has been obtained as long as the inflammatory process remains active.
Frequent intra-articular injection may result in damage to joint tissues.
The slower rate of absorption by intramuscular administration should be recognized.
Reference
This information is obtained from the National Institute of Health's Standard Packaging Label drug database.
"https://dailymed.nlm.nih.gov/dailymed/"
While we update our database periodically, we cannot guarantee it is always updated to the latest version.
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