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Famciclovir

Phase 3

Genital Herpes | Small molecule | Infectious Disease |Novartis AG|Last Updated: Jun 25, 2021

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials1
Total Enrollment1,179

FDA Designations

No designations recorded

Clinical trial landscape

Famciclovir · 6 trials · 6 indications

Phase 3 4Phase 2 2
NCT00306787Efficacy and Safety of Famciclovir 1-day Treatment Compared to 3-day Treatment With Valacyclovir in Adults With Recurrent Genital HerpesGenital Herpes
COMPLETED1,179 Analytics
NCT00098046Famciclovir Oral Pediatric Formulation in Children 1-12 Years of Age With Varicella Zoster InfectionChickenpox
COMPLETED76 Analytics
NCT00098059Famciclovir Pediatric Formulation in Children 1 to 12 Years of Age With Herpes Simplex InfectionHerpes Simplex
COMPLETED74 Analytics
NCT00171990Efficacy and Safety of Oral Famciclovir in Patients With Active Recurrent Genital HerpesRecurrent Genital Herpes
COMPLETED1,461 Analytics
PHASE3COMPLETED
Efficacy and Safety of Famciclovir 1-day Treatment Compared to 3-day Treatment With Valacyclovir in Adults With Recurrent Genital Herpes
Genital HerpesUnlock trial analytics
PHASE3COMPLETED
Famciclovir Oral Pediatric Formulation in Children 1-12 Years of Age With Varicella Zoster Infection
ChickenpoxUnlock trial analytics
PHASE3COMPLETED
Famciclovir Pediatric Formulation in Children 1 to 12 Years of Age With Herpes Simplex Infection
Herpes SimplexUnlock trial analytics
PHASE3COMPLETED
Efficacy and Safety of Oral Famciclovir in Patients With Active Recurrent Genital Herpes
Recurrent Genital HerpesUnlock trial analytics

Study Endpoints

Primary Endpoints

Investigator-assessed Time to Healing of All Non-aborted Genital Herpes Lesions
72 hours after initiation of study medication up to Day 20

Time to healing of all non-aborted genital herpes lesions was defined as the time from the first dose of study drug taken no earlier than the recurrence of genital herpes to the investigator-assessed time of healing (i.e. loss of all crusts and re-epithelialization of the lesions; erythema could have been present). Non-aborted lesions are lesions which underwent vesicle, ulcer/soft crust, and/or hard crust formation and required re-epithelialization for healing. The median time was estimated using Kaplan-Meier method by censoring missing values at the time of last clinical lesion observation.

Step A: Single-dose safety and pharmacokinetics
Step B: Safety and tolerability of pediatric formulation administered 3 times daily over 7 days
Safety and Tolerability of a Single-dose of Famciclovir in Part A of the Study.
8 hours and 24 hours after study drug administration (Part A)

A patient with multiple adverse events (AEs) within the primary system organ class is counted only once in total row.

Maximum Observed Plasma Concentration of Penciclovir (Cmax)
plasma level measurements: pre-dose, 1, 2, 3, 4 and 5 hours post-dose

PK parameter; penciclovir is the active metabolite of famciclovir.

Time of Maximum Observed Plasma Concentration of Penciclovir (Tmax)
Plasma level measurements: pre-dose, 1, 2, 3, 4 and 5 hours post-dose

PK parameter; penciclovir is the active metabolite of famciclovir.

Area Under the Penciclovir Plasma Concentration-time Curve From Time 0 to Infinity (AUC0-∞)
Plasma level measurements: pre-dose, 1, 2, 3, 4 and 5 hours post-dose

PK parameter; penciclovir is the active metabolite of famciclovir.

Apparent Oral Clearance of Penciclovir (CL/F)
Plasma level measurements: pre-dose, 1, 2, 3, 4 and 5 hours post-dose

PK parameter; penciclovir is the active metabolite of famciclovir.

Apparent Terminal Elimination Half-life of Penciclovir (T1/2)
Plasma level measurements: pre-dose, 1, 2, 3, 4 and 5 hours post-dose

PK parameter; penciclovir is the active metabolite of famciclovir

Safety and Tolerability of Famciclovir Pediatric Oral Formulation in Part B of the Study.
Administered 2 times daily over 7 days

A patient with multiple AEs within the primary system organ class is counted only once in total row.

Estimated probability being not lesion-free(i.e. not healed) 5.5 elapsed days (132 hours) after patient self-initiation therapy.
Number of Participants Reported Adverse Events (AEs), Serious Adverse Events (SAEs)
From Start of the Study up to Day 36

AEs are defined as any unfavorable and unintended diagnosis, symptom, sign (including an abnormal laboratory finding), syndrome or disease which either occurs during study, having been absent at baseline, or, if present at baseline, appears to worsen. Serious adverse events are any untoward medical occurrences that result in death, are life threatening, require (or prolong) hospitalization, cause persistent or significant disability/incapacity, result in congenital anomalies or birth defects, or are other conditions which in judgment of investigators represent significant hazards.

Number of Participants With Clinically Significant Laboratory Abnormalities
From Start of the Study up to Day 36

Participants with laboratory values outside the defined normal range were graded as clinically significant laboratory abnormalities. Laboratory values were assessed according to the National Cancer Institute- Common terminology criteria for Adverse Events (NCI-CTCAE). Hematology, Urinalysis and clinical chemistry were reported .

Pharmacokinetics of Single Dose - Tmax
Plasma samples were collected at 0.5, 1, 4 and 6 hours after dosing.

Measured by Tmax - The time after administration of a drug when the maximum plasma concentration is reached.

Pharmacokinetics of Single Dose - Cmax
Plasma samples were collected at 0.5, 1, 4 and 6 hours after dosing.

Measured by Cmax - The maximum plasma concentration of study medication

Pharmacokinetics of Single Dose - AUC(0-tlast)
Plasma samples were collected at 0.5, 1, 4 and 6 hours after dosing.

Measured by AUC(0-tlast) - Area under the plasma concentration time curve from time zero to the last quantifiable concentration-timepoint.

Pharmacokinetics of Single Dose - AUC(0-6h)
Plasma samples were collected at 0.5, 1, 4 and 6 hours after dosing.

Measured by AUC(0-6h) - Area under the plasma concentration time curve from time zero up to 6 hours post dose (i.e. the time of the last sample).

Secondary Endpoints

Percentage of Participants With Aborted Genital Herpes Lesions
72 hours after initiation of study medication up to Day 20
Investigator-assessed Time to Healing of All (Non-aborted and Aborted) Genital Herpes Lesions
72 hours after initiation of study medication up to Day 20
Time to Resolution of Symptoms Associated With Recurrent Genital Herpes
72 hours after initiation of study medication up to Day 20
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
FamciclovirEXPERIMENTALPatients received Famciclovir 1000 mg (2 x 500 mg tablets) twice a day for one day. The first dose was to be taken within 6 hours after onset of prodromal symptoms or genital herpes lesions and the second dose approximately 12 hours later. Patients also received 1 valacyclovir placebo capsule, beginning with the first famciclovir dose, twice a day for 3 days, each taken about 12 hours apart.
ValacyclovirACTIVE_COMPARATORPatients received Valacyclovir 500 mg capsule twice a day approximately 12 hours apart for 3 consecutive days. The first dose was to be taken within 6 hours after onset of prodromal symptoms or genital herpes lesions. On the first day patients also received 2 famciclovir placebo tablets taken with the first 2 doses of Valacyclovir.
Famciclovir, pediatric oral formulationEXPERIMENTALsingle-arm

Interventions

NameTypeDescription
FamciclovirDRUGFamciclovir 500 mg tablet
ValacyclovirDRUGValacyclovir 500 mg capsule
Placebo matching famciclovirDRUGFamciclovir placebo, matching in size, color and forms of famciclovir tablet.
Placebo matching valacyclovirDRUGValacyclovir placebo, matching in size, color and forms of valacyclovir capsule.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites66

Inclusion Criteria: * At least 18 years old * History of at least 4 recurrences of genital herpes in the preceding 12 months * Lesions located on the external genitalia or anogenital region * Willing to discontinue suppressive treatment * Documented positive herpes simplex virus (HSV) * General goo...

Countries:United StatesAustraliaCanadaGermanyCosta RicaGuatemalaPanama
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Frequently asked questions about Famciclovir

What is Famciclovir used for?

Famciclovir is an investigational small molecule being studied for the treatment of recurrent genital herpes, herpes simplex, herpes labialis, genital herpes, and chickenpox. It is in Phase 3 clinical development for these infectious disease indications.

Who makes Famciclovir?

Famciclovir is being developed by Novartis AG, which trades under the ticker NVS. The company is conducting clinical trials to evaluate the drug's safety and efficacy in pediatric and adult patient populations.

What phase is Famciclovir in?

Famciclovir is in Phase 3 clinical development. It is an investigational drug and has not been approved by regulatory authorities. Multiple Phase 3 trials have been completed to assess its use in herpes-related infections.

What clinical trials is Famciclovir in?

Famciclovir has been studied in several completed clinical trials, including NCT00098046 in children with chickenpox, NCT00098059 in children with herpes simplex, and NCT00306787 comparing a 1-day famciclovir regimen to a 3-day valacyclovir regimen in adults with recurrent genital herpes.

Is Famciclovir the same as valacyclovir?

No, Famciclovir is not the same as valacyclovir. They are separate antiviral drugs. In one clinical trial, NCT00306787, a 1-day treatment with famciclovir was directly compared to a 3-day treatment with valacyclovir in adults with recurrent genital herpes.

Has Famciclovir been studied in children?

Yes, Famciclovir has been studied in pediatric populations. Completed Phase 3 trials evaluated an oral pediatric formulation in children aged 1 to 12 years with chickenpox or herpes simplex infection, and a Phase 2 trial assessed the drug in infants aged 1 month to less than 12 months.