Trifluridine
Also sold as: Lonsurf, Viroptic
Related Medications
These drugs share a pharmacologic classification but are NOT interchangeable. Listing here does not imply clinical equivalence. A physician must evaluate each drug individually for the patient's specific condition.
Classification: Nucleic Acid Synthesis Inhibitors (source: RxClass/NLM)
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Insurance Coverage User-Reported
No community coverage data yet for trifluridine.
Coverage data submission coming soon.
Drug Information
Indications & Uses
INDICATIONS AND USAGE: Trifluridine Ophthalmic Solution is indicated for the treatment of primary keratoconjunctivitis and recurrent epithelial keratitis due to herpes simplex virus, types 1 and 2.
Dosage & Administration
DOSAGE AND ADMINISTRATION: Instill one drop of Trifluridine Ophthalmic Solution onto the cornea of the affected eye every 2 hours while awake for a maximum daily dosage of nine drops until the cornea ulcer has completely re-epithelialized. Following re-epithelialization, treatment for an additional 7 days of one drop every 4 hours while awake for a minimum daily dosage of five drops is recommended. If there are no signs of improvement after 7 days of therapy or complete re-epithelialization has not occurred after 14 days of therapy, other forms of therapy should be considered. Continuous administration of trifluridine for periods exceeding 21 days should be avoided because of potential ocular toxicity.
Warnings & Precautions
WARNINGS: The recommended dosage and frequency of administration should not be exceeded (See DOSAGE AND ADMINISTRATION ).
Side Effects (Adverse Reactions)
ADVERSE REACTIONS: The most frequent adverse reactions reported during controlled clinical trials were mild, transient burning or stinging upon instillation (4.6%) and palpebral edema (2.8%). Other adverse reactions in decreasing order of reported frequency were superficial punctate keratopathy, epithelial keratopathy, hypersensitivity reaction, stromal edema, irritation, keratitis sicca, hyperemia, and increased intraocular pressure.
Contraindications
CONTRAINDICATIONS: Trifluridine Ophthalmic Solution is contraindicated for patients who develop hypersensitivity reactions or chemical intolerance to trifluridine.
Verify with Primary Sources
Always verify clinical information with authoritative sources.
Medical Disclaimer: Information on this page is sourced from FDA-approved labeling data and is for educational reference only. It does not constitute medical advice. This information does not establish a provider-patient relationship. Always verify with current prescribing information and consult a licensed healthcare professional before any clinical decision. Read full disclaimer.
Data sourced from RxNorm (NLM/NIH), FDA Orange Book, OpenFDA, DailyMed. Last updated: 2026-03-02.