Prophylaxis for herpes keratitis with oral antivirals uses the same dosage but with what frequency?

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Study for the NBEO Part II TMOD Exam. Prepare with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

Prophylaxis for herpes keratitis with oral antivirals uses the same dosage but with what frequency?

Explanation:
Suppressive use aims to keep antiviral levels steady to prevent reactivation, so you keep the same dose but reduce how often you take it. For herpes keratitis, the usual episodic treatment is 400 mg five times daily. When used for prophylaxis, that same 400 mg is taken twice daily, providing continuous coverage with a manageable schedule. Taking it three or four times daily would be more frequent than necessary, and once daily wouldn’t maintain adequate trough levels to prevent recurrences. Therefore, the appropriate frequency is twice daily.

Suppressive use aims to keep antiviral levels steady to prevent reactivation, so you keep the same dose but reduce how often you take it. For herpes keratitis, the usual episodic treatment is 400 mg five times daily. When used for prophylaxis, that same 400 mg is taken twice daily, providing continuous coverage with a manageable schedule. Taking it three or four times daily would be more frequent than necessary, and once daily wouldn’t maintain adequate trough levels to prevent recurrences. Therefore, the appropriate frequency is twice daily.

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