Comparative Pharmacology
Head-to-head clinical analysis: ACYCLOVIR versus TRIFLURIDINE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ACYCLOVIR versus TRIFLURIDINE.
ACYCLOVIR vs TRIFLURIDINE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Acyclovir is a synthetic nucleoside analog that inhibits viral DNA replication. It is phosphorylated to acyclovir monophosphate by viral thymidine kinase, then converted to acyclovir triphosphate by cellular kinases. Acyclovir triphosphate competes with deoxyguanosine triphosphate for viral DNA polymerase, incorporating into viral DNA and causing chain termination.
Trifluridine is a thymidine analog that inhibits thymidylate synthase and incorporates into DNA, leading to DNA damage and cell death.
400 mg orally twice daily for herpes zoster; 200 mg orally 5 times daily for genital herpes; 5-10 mg/kg intravenously every 8 hours for severe infections.
Topical: Apply one drop to affected eye every 2 hours while awake (maximum 9 drops/day) until re-epithelialization, then one drop every 4 hours for 7 days. Ophthalmic solution 1%.
None Documented
None Documented
Clinical Note
moderateTrifluridine + Digoxin
"Trifluridine may decrease the cardiotoxic activities of Digoxin."
Clinical Note
moderateTrifluridine + Digitoxin
"Trifluridine may decrease the cardiotoxic activities of Digitoxin."
Clinical Note
moderateTrifluridine + Deslanoside
"Trifluridine may decrease the cardiotoxic activities of Deslanoside."
Clinical Note
moderateTrifluridine + Acetyldigitoxin
"Trifluridine may decrease the cardiotoxic activities of Acetyldigitoxin."
Terminal elimination half-life is 2.5–3.3 hours in adults with normal renal function; increases to 19.5 hours in anuria.
The terminal elimination half-life of trifluridine is approximately 12-18 hours. This prolonged half-life supports twice-daily dosing and provides sustained exposure for antiviral activity.
Renal excretion of unchanged drug via glomerular filtration and tubular secretion accounts for 62-90% of elimination. Fecal elimination is <2%.
Renal excretion accounts for approximately 40-50% of the administered dose, primarily as the inactive metabolite 5-trifluorothymidine. Fecal excretion is minimal (<5%). The remainder is eliminated via metabolic degradation.
Category A/B
Category C
Antiviral
Antiviral