Comparative Pharmacology
Head-to-head clinical analysis: INCIVEK versus VALACYCLOVIR HYDROCHLORIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: INCIVEK versus VALACYCLOVIR HYDROCHLORIDE.
INCIVEK vs VALACYCLOVIR HYDROCHLORIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Inhibitor of the HCV NS3/4A serine protease, preventing cleavage of the HCV polyprotein, thereby inhibiting viral replication.
Valacyclovir hydrochloride is a prodrug of acyclovir. After oral administration, it is rapidly converted to acyclovir, which inhibits viral DNA polymerase, leading to chain termination and inhibition of viral DNA replication.
Incivek (telaprevir) is administered orally at a dose of 750 mg (two 375 mg tablets) three times daily (every 7-9 hours) with food (not low-fat).
500 mg orally twice daily for recurrent genital herpes; 1 g orally twice daily for herpes zoster; 1 g orally three times daily for herpes simplex encephalitis or immunocompromised patients.
None Documented
None Documented
Terminal elimination half-life ranges from 4 to 13 hours (mean ~7 hours) in healthy volunteers; prolonged to 10-20 hours in HCV-infected patients.
Terminal elimination half-life: 2.5–3.3 hours in patients with normal renal function; prolonged to 14 hours in renal impairment (CrCl 15–30 mL/min).
Approximately 91% of the radiolabeled dose is recovered in feces (79% as unchanged drug) and 9% in urine (1% as unchanged drug).
Renal excretion: >90% as unchanged drug and inactive metabolite (9-carboxymethoxymethylguanine). Biliary/fecal: <2%.
Category C
Category A/B
Antiviral
Antiviral