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Given the long half-life of dexamethasone, what is an appropriate dose schedule?

For a patient receiving 16 mg/day, it is frequently prescribed as 4 mg q 6 hrs. This results in the patient being awoken at night, when sleep disturbance is already an issue. Is 4 mg QID or 8 mg BID equally effective?
3 Answers
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Radiation Oncology · John Theurer Cancer Center At Hackensack Univ Med Center
Answered on

After a discussion years ago with my fellowship-trained Neuro-oncologist friend (from Neurology track), I use dexamethasone only ever on a qam schedule. It doesn’t disrupt the sleep as much, there’s no waking for doses, the schedule is easy for patients and families to remember. In seven years of pr...

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Radiation Oncology · Karmanos Cancer Institute - McLaren Proton Therapy Center
Answered on

Hi @Dr. First Last, I agree that waking patients at night for a Q6H dose is poor medicine. For higher dose decadron, I try to keep it 4mg TID after food. 25% less medication (TID) is unlikely to make a major difference compared to QID.

Once I get to BID decadron, I tell patients to take it after bre...

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Radiation Oncology · UC San Diego
Answered on

I agree with the answers above that it is fine (preferable) to use less frequent dosing. I do once in the morning or BID and typically no more than 4-8 mg per day. This is also the practice of my colleagues in rad onc and neuro-oncology here.

The half life is listed at 1.8-3.5 hours (Medscape), but t...

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