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Prednisone 5 mg is equivalent to dexamethasone 0.75 mg. The prescriber wants to convert his patient who is on prednisone 15 mg PO BID to dexamethasone. What is the equivalent daily dose?

  1. 2.25 mg
  2. 4 mg
  3. 4.5 mg
  4. 5 mg

30 mg prednisone / x mg dexamethasone = 5 mg prednisone / 0.75 mg dexamethasone

X = (30 mg prednisone x 0.75 mg dexamethasone) / 5 mg prednisone
X = 4.5 mg dexamethasone

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