What is the typical dosing per day for topical Trifluridine (Viroptic)?

What is the typical dosing per day for topical Trifluridine (Viroptic)?

• A. 6x daily
• B. 9x daily
• C. 12x daily
• D. 3x daily

Answer: (B)

Frequent application is needed because trifluridine is cleared quickly from the tear film and has limited persistence on the ocular surface. The standard regimen aims to maintain therapeutic levels in the cornea, so the typical dosing is one drop every two hours during waking hours, which totals about nine doses per day. This high-frequency plan is usually used for about a week and then tapered as signs improve. Lowering the frequency to three times daily would provide insufficient antiviral exposure to control the infection, while regimens about six or twelve times daily aren’t the standard approach and can either miss the target exposure or increase local toxicity. Nine times per day best reflects the balance of efficacy and safety for topical trifluridine.

Frequent application is needed because trifluridine is cleared quickly from the tear film and has limited persistence on the ocular surface. The standard regimen aims to maintain therapeutic levels in the cornea, so the typical dosing is one drop every two hours during waking hours, which totals about nine doses per day. This high-frequency plan is usually used for about a week and then tapered as signs improve. Lowering the frequency to three times daily would provide insufficient antiviral exposure to control the infection, while regimens about six or twelve times daily aren’t the standard approach and can either miss the target exposure or increase local toxicity. Nine times per day best reflects the balance of efficacy and safety for topical trifluridine.