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(prednisone) Delayed-release Tablets
The active ingredient in RAYOS is prednisone (a corticosteroid). Corticosteroids are adrenocortical steroids, both naturally occurring and synthetic. The molecular formula for prednisone is C21H26O5. The chemical name for prednisone is 17,21-dihydroxypregna-1,4diene-3,11,20-trione, and the structural formula is:
Prednisone is a white to practically white, odorless, crystalline powder and has a molecular weight of 358.43. Prednisone is very slightly soluble in water; slightly soluble in alcohol, chloroform, dioxane, and methanol.
RAYOS is a delayed-release prednisone tablet. It consists of a prednisone-containing core tablet in an inactive shell, which delays the onset of in vitro drug dissolution by approximately 4 hours. Each tablet contains 1 mg, 2 mg, or 5 mg of prednisone, with the following inactive ingredients: dibasic calcium phosphate dihydrate, colloidal silicon dioxide, croscarmellose sodium, glycerol dibehenate, lactose monohydrate, magnesium stearate, povidone, yellow ferric oxide, and red ferric oxide.
Last reviewed on RxList: 7/2/2013
This monograph has been modified to include the generic and brand name in many instances.
Additional Rayos Information
- Rayos Drug Interactions Center: prednisone oral
- Rayos Side Effects Center
- Rayos FDA Approved Prescribing Information including Dosage
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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