Famciclovir

CHEMBL880 Phase 4 Approved Small molecule

Half-Life

—

Bioavailability

—

Protein Binding

—

Molecular Weight

321.3 g/mol

LogP

—

Phase

4

This antiviral medication is converted in the body to penciclovir, which blocks the enzyme herpes viruses need to copy their DNA and spread to new cells. It is used to treat herpes zoster and recurrent genital herpes.

Molecular Weight

321.3300 g/mol

LogP

0.00

TPSA

122.00 Å²

Lipinski RO5

Pass

Therapeutic Areas

Atrial Fibrillation Multiple Sclerosis

Pharmacokinetics (PK)

Pharmacodynamics (PD)

2D Structure

SVG PNG

Cite this structure

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SMILES

CC(=O)OCC(CCn1cnc2cnc(N)nc21)COC(C)=O

InChI

InChI=1S/C14H19N5O4/c1-9(20)22-6-11(7-23-10(2)21)3-4-19-8-17-12-5-16-14(15)18-13(12)19/h5,8,11H,3-4,6-7H2,1-2H3,(H2,15,16,18)

Molecular Formula

C14H19N5O4

HBD / HBA

1 / 8

Rotatable Bonds

9

Heavy Atoms

23

No targets recorded

Target interaction data is not yet available for this drug.

No interactions recorded

Drug interaction data is not yet available for this compound.

No side effects recorded

Side effect data is not yet available for this drug.

Frequently Asked Questions

This antiviral medication is converted in the body to penciclovir, which blocks the enzyme herpes viruses need to copy their DNA and spread to new cells. It is used to treat herpes zoster and recurrent genital herpes.

Yes, Famciclovir is an approved drug. It has reached clinical phase 4. It is classified as a Small molecule.

{# References & Data Sources section for drug detail pages. Renders standard pharmacological database links plus the drug's data_sources field. #}

References & Data Sources

ChEMBL — European Bioinformatics Institute (EBI). CHEMBL880. Open-access bioactivity database.
PubChem — National Center for Biotechnology Information (NCBI). CID 3324. Chemical information database.

Data aggregated from publicly available pharmacological databases. Last updated 2026-03-04.

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Structure

Quick Data

Formula: C14H19N5O4
Synonyms: 2

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Medical Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making medication decisions.

Data sources: ChEMBL, PubChem, DailyMed.