Ribavirin is a guanosine nucleoside used to treat some forms of Hepatitis C.

Brand Names
Ibavyr, Rebetol, Virazole
Generic Name
DrugBank Accession Number

Producing a broad-spectrum activity against several RNA and DNA viruses, Ribavirin is a synthetic guanosine nucleoside and antiviral agent that interferes with the synthesis of viral mRNA. It is primarily indicated for use in treating hepatitis C and viral hemorrhagic fevers. HCV is a single-stranded RNA virus that is categorized into nine distinct genotypes, with genotype 1 being the most common in the United States, and affecting 72% of all chronic HCV patients 9. It is reported that ribavirin might be only effective in early stages of viral hemorrhagic fevers including Lasser fever, Crimean-Congo hemorrhagic fever, Venezuelan hemorrhagic fever, and Hantavirus infection. Ribavirin is a prodrug that is metabolized into nucleoside analogs that blocks viral RNA synthesis and viral mRNA capping. Before the development of newer drugs, ribavirin and Peginterferon alfa-2a/Peginterferon alfa-2b dual therapy was considered the first-generation and standard antiviral treatment 5. The dual therapy was administered for 48 weeks in patients with genotype 1, 4, 5, and 6, and 24 weeks in patients with genotype 2 and 3 5. Newer drugs developed as Hepatitis C viral infection treatments can be used to reduce or eliminate the use of ribavirin, which are associated with serious adverse effects. They also improve therapeutic efficacy in patients with failed Peginterferon alfa-2a/Peginterferon alfa-2b and ribavirin-based therapy. The potential use of ribavirin as a treatment for acute myeloid leukemia is currently under investigation.

According to 2017 American Association for the Study of Liver Diseases (AASLD) and 2015 consensus guidelines from the Canadian Association for the Study of the Liver (CASL), ribavirin is typically used as an adjunct therapy to various first-line and second-line combination therapies recommended for each genotypes. Ribavirin is added to decrease relapse rates by accelerating viral clearance early in the treatment course 7. When used to treat Hepatitis C virus (HCV) infections, it is always used as a part of combination therapies as ribavirin monotherapy is not efficacious in the treatment of chronic hepatitis C infection 6. Additionally, including ribavirin in the regimen can increase the risk of anemia.

In HCV genotye 1/2/3/4/5/6 patients, ribavirin can be used in combination therapy involving Daclatasvir and Sofosbuvir, Eplusa (Sofosbuvir, Velpatasvir), Harvoni (Sofosbuvir, Ledipasvir), Simeprevir and Sofosbuvir, Viekira Pak (Ombitasvir, Paritaprevir, Ritonavir, Dasabuvir), Technivie (Ritonavir, Ombitasvir, Paritaprevir) and Zepatier (Elbasvir, Grazoprevir). Addition of weight-based ribavirin to Technivie therapy increased sustained virologic response after 12 weeks of daily therapy (SVR12) from 90% to 97% in patients with HCV genotype 1a and 90.9% to 100% in HCV genotype 4 patients 9. Zepatier therapy along with ribavirin improved SVR in HCV genotype 5 patients. Combination therapy of ribavirin and Peginterferon alfa-2a results in the SVR of 44% in patients with genotype 1 infection and 70% in patients with genotype 2-6. The inclusion of ribavirin in the combination therapies depend on individual patient's profile, for example if HCV genotype 3 patient has a Y93H genetic variant and compensated cirrhosis.

Small Molecule
Average: 244.2047
Monoisotopic: 244.080769514
Chemical Formula
  • 1-beta-D-Ribofuranosyl-1,2,4-triazole-3-carboxamide
  • 1-beta-D-Ribofuranosyl-1H-1,2,4-triazole-3-carboxamide
  • RBV
  • Ribavirin
  • Ribavirina
  • Ribavirine
  • Ribavirinum
  • Tribavirin
External IDs
  • ICN 1229
  • SCH 18908
  • SCH-18908



Indicated for the treatment of chronic Hepatitis C virus (HCV) infection in combination with other antiviral agents with the intent to cure or achieve a sustained virologic response (SVR). Typically added to improve SVR and reduce relapse rates 6.

The addition of ribavirin in Technivie therapy indicated for treating HCV genotype 1a and 4 infections is recommended in patients with or without cirrhosis.

Resistance: viral genetic determinants resulting in variable response to ribavirin therapy has not been yet determined.

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Associated Conditions
Indication TypeIndicationCombined Product DetailsApproval LevelAge GroupPatient CharacteristicsDose Form
Used in combination to treatChronic hepatitis cCombination Product in combination with: Peginterferon alfa-2a (DB00008)••••••••••••••• ••••••••
Used in combination to treatChronic hepatitis cCombination Product in combination with: Peginterferon alfa-2a (DB00008)••••••••••••
Treatment ofSevere respiratory syncytial virus infection••••••••••••••••••••• ••••••••••••••
Contraindications & Blackbox Warnings
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Ribavirin mediates direct antiviral activity against a number of DNA and RNA viruses by increasing the mutation frequency in the genomes of several RNA viruses. It is a member of the nucleoside antimetabolite drugs that interfere with duplication of the viral genetic material. The drug inhibits the activity of the enzyme RNA dependent RNA polymerase, due to its resemblence to building blocks of the RNA molecules.

Mechanism of action

Ribavirin is reported to have several mechanism of actions that lead to inhibition of viral RNA and protein synthesis. After activation by adenosine kinase to ribavirin mono-, di-, and triphosphate metabolites. Ribavirin triphosphate (RTP) is the predominant metabolite which directly inhibits viral mRNA polymerase by binding to the nucleotide binding site of the enzyme. This prevents the binding of the correct nucleotides, leading to a reduction in viral replication or to the production of defective virions 7. RTP also demonstrates an inhibitory action on viral mRNA guanylyltransferase and mRNA 2′-O-methyltransferase of dengue virus. Inhibition of these enzymes disrupts the posttranslational capping of the 5′ end of viral mRNA through ribavirin being incorporated at the 5′ end in place of guanosine and preventing the cap methylation step.

Inhibition of host inosine monophosphate dehydrogenase (IMPDH) and subsequent depletion of GTP pool is proposed to be another mechanism of action of ribavirin. IMPDH catalyzes the rate-limiting step where inosine 5′-monophosphate is converted to xanthine monophosphate during guanosine monophosphate (GMP) synthesis. GMP is later converted to guanosine triphoshpate (GTP). Ribavirin monophosphate mimics inosine 5′-monophosphate and acts as a competitive inhibitor of IMPDH. Inhibited de novo synthesis of guanine nucleotides and decreased intracellular GTP pools leads to a decline in viral protein synthesis and limit replication of viral genomes 7.

Ribavirin acts as a mutagen in the target virus to cause an 'error catastrophe' due to increased viral mutations. RTP pairs with cytidine triphosphate or uridine triphosphate with equal efficiency and to block HCV RNA elongation. It causes premature termination of nascent HCV RNA and increases mutagenesis by producing defective virions 7.

Ribavirin also exerts an immunomodulatory action of the host to the virus by shifting a Th2 response in favor of a Th1 phenotype. Th2 response and production of type 2 cytokines such as IL-4, IL-5, and IL-10 stimulates the humoral response which enhances immunity toward the virus 7. Ribavirin enhanced induction of interferon-related genes, including the interferon-α receptor, and down-regulation of genes involved in interferon inhibition, apoptosis, and hepatic stellate cell activation in vitro 6.

AInosine-5'-monophosphate dehydrogenase 1
ARNA-directed RNA polymerase L
AGenome polyprotein
UInosine-5'-monophosphate dehydrogenase 2Not AvailableHumans
URNA-directed RNA polymerase catalytic subunit
Influenza A virus (strain A/Beijing/11/1956 H1N1)

Ribavirin is reported to be rapidly and extensively absorbed following oral administration. The average time to reach Cmax was 2 hours after oral administration of 1200 mg ribavirin Label. The oral bioavailability is 64% following a single oral dose administration of 600mg ribavirin 10.

Volume of distribution

Ribavirin displays a large volume of distribution Label.

Protein binding

No protein binding reported 10.


First and as a step required for activation, ribavirin is phosphorylated intracellularly by adenosine kinase to ribavirin mono-, di-, and triphosphate metabolites. After activation and function, ribavirin undergoes two metabolic pathways where it is reversibly phosphorlyated or degraded via deribosylation and amide hydrolysis to yield a triazole carboxylic acid metabolite. In vitro studies indicate that ribavirin is not a substrate of CYP450 enzymes 10.

Route of elimination

The metabolites of ribavirin are renally excreted. After the oral administration of 600mg radiolabeled ribavirin, approximately 61% of the drug was detected in the urine and 12% was detected in the feces. 17% of administered dose was in unchanged form 10.


The terminal half-life of ribavirin following administration of a single oral dose of 1200 mg is about 120 to 170 hours Label.


The total apparent clearance rate after a single oral dose administration of 1200 mg ribavirin is 26L/h Label.

Adverse Effects
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Rivabirin and PEG-Interferon Alfa-2A dual therapy is associated with flu-like symptoms, depression, suicide, insomnia, irritability, relapse of drug abuse/overdose, hepatic decompensation in 2% of HIV co-infected patients and bacterial infections each occurring at a frequency of less than 1%. Ribavirin-induced anemia is a dose-dependent adverse effect where reduced hemoglobin levels can be seen within the first 1-2 weeks in therapy. The mechanism of ribavirin-induced anemia has been shown to involve reductions in reticulocyte counts and erythrocyte Na-K pump activity, and increases in K-Cl cotransport, membrane bound IgG, and C3, and erythrocyte band 3 6. Oral LD50 in rats is 2700 mg/kg. Intraperitoneal LD50 in mouse is 1300 mg/kg. Potential carcinogenic effects of ribavirin to humans cannot be yet excluded as it demonstrates mutagenic activity in the in vitro mouse lymphoma assay.

Not Available
Pharmacogenomic Effects/ADRs
Interacting Gene/EnzymeAllele nameGenotype(s)Defining Change(s)Type(s)DescriptionDetails
Interferon lambda-3---(T;T) / (C;T) / (G;G) / (G;T)C > TEffect Directly StudiedPatients with this genotype in IFNL3 have a reduced likelihood of achieving sustained virologic response to ribavirin therapy.Details


Drug Interactions
This information should not be interpreted without the help of a healthcare provider. If you believe you are experiencing an interaction, contact a healthcare provider immediately. The absence of an interaction does not necessarily mean no interactions exist.
AbacavirRibavirin may increase the hepatotoxic activities of Abacavir.
AceclofenacAceclofenac may decrease the excretion rate of Ribavirin which could result in a higher serum level.
AcemetacinAcemetacin may decrease the excretion rate of Ribavirin which could result in a higher serum level.
AcetaminophenAcetaminophen may decrease the excretion rate of Ribavirin which could result in a higher serum level.
AcetazolamideAcetazolamide may increase the excretion rate of Ribavirin which could result in a lower serum level and potentially a reduction in efficacy.
Food Interactions
  • Avoid alcohol. Ribavirin is used to treat chronic hepatitis C infection; ingesting alcohol may worsen this infection.
  • Take with food. Taking ribavirin with a high-fat meal slows the absorption and increases the AUC and Cmax of ribavirin.


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Product Images
International/Other Brands
Rebretron / Ribamide / Vilona (Valeant) / Viramid (Il Sung) / Virazide (Grossman)
Brand Name Prescription Products
NameDosageStrengthRouteLabellerMarketing StartMarketing EndRegionImage
CopegusTablet, film coated200 mg/1OralGenentech, Inc.2002-12-032018-01-31US flag
IbavyrTablet200 mgOralPendopharm Division Of Pharmascience Inc2015-05-01Not applicableCanada flag
IbavyrTablet600 mgOralPendopharm Division Of Pharmascience Inc2014-07-14Not applicableCanada flag
IbavyrTablet400 mgOralPendopharm Division Of Pharmascience Inc2014-07-14Not applicableCanada flag
ModeribaTablet200 mgOralAbbvie2015-02-172018-11-26Canada flag
Generic Prescription Products
NameDosageStrengthRouteLabellerMarketing StartMarketing EndRegionImage
ModeribaTablet, film coated200 mg/1OralAbbVie Inc.2014-01-202019-05-01US flag
ModeribaTablet, film coated400 mg/1OralAbbVie Inc.2014-01-202018-10-31US flag
ModeribaTablet, film coated600 mg/1OralAbbVie Inc.2014-01-202019-04-30US flag
RibasphereTablet, film coated400 mg/1OralKadmon Pharmaceuticals, LLC2005-12-052019-09-30US flag
RibasphereTablet200 mg/1OralRemedy Repack2011-11-182014-01-29US flag
Mixture Products
NameIngredientsDosageRouteLabellerMarketing StartMarketing EndRegionImage
ModeribaRibavirin (200 mg/1) + Ribavirin (400 mg/1)KitOralAbbVie Inc.2014-01-202018-10-31US flag
ModeribaRibavirin (400 mg/1) + Ribavirin (600 mg/1)KitOralAbbVie Inc.2014-01-202018-10-31US flag
ModeribaRibavirin (200 mg/1) + Ribavirin (400 mg/1)KitOralAbbVie Inc.2014-01-202018-10-31US flag
ModeribaRibavirin (400 mg/1) + Ribavirin (600 mg/1)KitOralAbbVie Inc.2014-01-202018-10-31US flag
Pegasys RbvRibavirin (200 mg / tab) + Peginterferon alfa-2a (180 mcg / 0.5 mL)Solution; TabletOral; SubcutaneousHoffmann La Roche2004-05-262018-07-10Canada flag
Unapproved/Other Products
NameIngredientsDosageRouteLabellerMarketing StartMarketing EndRegionImage
VirazoleRibavirin (0.1 g/1mL)LiquidIntravenousLegacy Pharmaceuticals Switzerland GmbH2017-12-06Not applicableUS flag


ATC Codes
J05AP01 — Ribavirin
Drug Categories
Chemical TaxonomyProvided by Classyfire
This compound belongs to the class of organic compounds known as triazole ribonucleosides and ribonucleotides. These are nucleoside derivatives containing a ribose (or deoxyribose) moiety which is N-glycosylated to a triazole. Nucleotides have a phosphate group linked to the C5 carbon of the ribose (or deoxyribose) moiety.
Organic compounds
Super Class
Nucleosides, nucleotides, and analogues
Triazole ribonucleosides and ribonucleotides
Sub Class
Not Available
Direct Parent
Triazole ribonucleosides and ribonucleotides
Alternative Parents
Glycosylamines / Pentoses / 2-heteroaryl carboxamides / Triazoles / Tetrahydrofurans / Heteroaromatic compounds / Secondary alcohols / Primary carboxylic acid amides / Oxacyclic compounds / Azacyclic compounds
show 5 more
1,2,4-triazole / 2-heteroaryl carboxamide / Alcohol / Aromatic heteromonocyclic compound / Azacycle / Azole / Carboxamide group / Carboxylic acid derivative / Glycosyl compound / Heteroaromatic compound
show 18 more
Molecular Framework
Aromatic heteromonocyclic compounds
External Descriptors
monocarboxylic acid amide, aromatic amide, 1-ribosyltriazole (CHEBI:63580)
Affected organisms
  • Hepatitis B virus
  • Hepatitis C virus, RSV and other RNA/DNA viruses

Chemical Identifiers

CAS number
InChI Key


Synthesis Reference
General References
  1. Sidwell RW, Bailey KW, Wong MH, Barnard DL, Smee DF: In vitro and in vivo influenza virus-inhibitory effects of viramidine. Antiviral Res. 2005 Oct;68(1):10-7. [Article]
  2. Sidwell RW, Huffman JH, Khare GP, Allen LB, Witkowski JT, Robins RK: Broad-spectrum antiviral activity of Virazole: 1-beta-D-ribofuranosyl-1,2,4-triazole-3-carboxamide. Science. 1972 Aug 25;177(4050):705-6. [Article]
  3. Alvarez D, Dieterich DT, Brau N, Moorehead L, Ball L, Sulkowski MS: Zidovudine use but not weight-based ribavirin dosing impacts anaemia during HCV treatment in HIV-infected persons. J Viral Hepat. 2006 Oct;13(10):683-9. [Article]
  4. Bani-Sadr F, Carrat F, Pol S, Hor R, Rosenthal E, Goujard C, Morand P, Lunel-Fabiani F, Salmon-Ceron D, Piroth L, Pialoux G, Bentata M, Cacoub P, Perronne C: Risk factors for symptomatic mitochondrial toxicity in HIV/hepatitis C virus-coinfected patients during interferon plus ribavirin-based therapy. J Acquir Immune Defic Syndr. 2005 Sep 1;40(1):47-52. [Article]
  5. Myers RP, Shah H, Burak KW, Cooper C, Feld JJ: An update on the management of chronic hepatitis C: 2015 Consensus guidelines from the Canadian Association for the Study of the Liver. Can J Gastroenterol Hepatol. 2015 Jan-Feb;29(1):19-34. Epub 2015 Jan 13. [Article]
  6. Martin P, Jensen DM: Ribavirin in the treatment of chronic hepatitis C. J Gastroenterol Hepatol. 2008 Jun;23(6):844-55. doi: 10.1111/j.1440-1746.2008.05398.x. [Article]
  7. Te HS, Randall G, Jensen DM: Mechanism of action of ribavirin in the treatment of chronic hepatitis C. Gastroenterol Hepatol (N Y). 2007 Mar;3(3):218-25. [Article]
  8. Huggins JW: Prospects for treatment of viral hemorrhagic fevers with ribavirin, a broad-spectrum antiviral drug. Rev Infect Dis. 1989 May-Jun;11 Suppl 4:S750-61. [Article]
  9. American Association for the Study of Liver Diseases; Infectious Diseases Society of America. HCV guidance. http://hcvguidelines.org. Accessed June 12, 2017. [Link]
  10. FDA Approved Drug Products: Rebetol (ribavirin) oral capsules [Link]
Human Metabolome Database
PubChem Compound
PubChem Substance
Therapeutic Targets Database
PDBe Ligand
RxList Drug Page
Drugs.com Drug Page
PDB Entries
3sfu / 4pb1 / 5axd / 8tz1
FDA label
Download (1.25 MB)
Download (350 KB)

Clinical Trials

Clinical Trials
Clinical Trial & Rare Diseases Add-on Data Package
Explore 4,000+ rare diseases, orphan drugs & condition pairs, clinical trial why stopped data, & more. Preview package
PhaseStatusPurposeConditionsCountStart DateWhy Stopped100+ additional columns
Not AvailableRecruitingNot AvailableAdrenal Insufficiency / Arrhythmia / Asthma in Children / Attention Deficit Hyperactivity Disorder (ADHD) / Chronic Lung Disease of Prematurity / Coagulation Disorder / Coronavirus Infection (COVID-19) / Down Syndrome (DS) / Edema / Fibrinolysis; Hemorrhage / Heart Failure / Hemophilia / Hypermenorrhea / Hyperphosphataemia / Hypertension / Hypokalemia / Insomnia / Mucocutaneous Lymph Node Syndrome / Multisystem Inflammatory Syndrome in Children (MIS-C) / Pain / Pneumonia / Primary Hyperaldosteronism / Pulmonary Arterial Hypertension (PAH) / Skin Infections / Urinary Tract Infections in Children1somestatusstop reasonjust information to hide
4Active Not RecruitingTreatmentHepatitis C Virus (HCV) Infection1somestatusstop reasonjust information to hide
4CompletedBasic ScienceChronic Hepatitis C Virus (HCV) Infection / Liver Disease / Viral Disease1somestatusstop reasonjust information to hide
4CompletedDiagnosticChronic Hepatitis C Virus (HCV) Infection1somestatusstop reasonjust information to hide
4CompletedPreventionChronic Hepatitis C Virus (HCV) Infection1somestatusstop reasonjust information to hide


  • Schering plough research institute
  • Three rivers pharmaceuticals llc
  • Aurobindo pharma ltd
  • Sandoz inc
  • Teva pharmaceuticals usa inc
  • Zydus pharmaceuticals usa inc
  • Valeant pharmaceuticals international
  • Schering corp
  • Hoffmann la roche inc
  • Amerisource Health Services Corp.
  • Aurobindo Pharma Ltd.
  • Ben Venue Laboratories Inc.
  • Cadila Healthcare Ltd.
  • DSM Corp.
  • F Hoffmann-La Roche Ltd.
  • Legacy Pharmaceuticals Packaging LLC
  • Mallinckrodt Inc.
  • Medisca Inc.
  • Par Pharmaceuticals
  • Patheon Inc.
  • Physicians Total Care Inc.
  • Prx Pharmaceuticals
  • Richmond Pharmacy
  • Sandoz
  • Schering Corp.
  • Schering-Plough Inc.
  • Teva Pharmaceutical Industries Ltd.
  • Three Rivers Pharmaceuticals LLC
  • Valeant Ltd.
  • Warrick Pharmaceuticals Corp.
  • Zydus Pharmaceuticals
Dosage Forms
Tablet, film coatedOral
Tablet, film coatedOral200 MG
Tablet, film coatedOral400 MG
TabletOral600 mg
Tablet, film coatedOral400 mg/1
Tablet, film coatedOral600 MG
Tablet, film coatedOral600 mg/1
Solution; tabletOral; Subcutaneous
Capsule; powder, for solutionOral; Subcutaneous
LiquidOral40 mg/1mL
SolutionOral40 mg/ml
CapsuleOral200 mg
Capsule; kit; liquidOral; Subcutaneous
TabletOral200 mg/1
Kit; tabletOral
TabletOral400 mg/1
TabletOral600 mg/1
CapsuleOral200 mg/1
Powder, for solutionRespiratory (inhalation)6 g/1
Tablet, coatedOral200 mg/1
Tablet, film coatedOral200 mg/1
Tablet, film coatedOral500 mg/1
Capsule, coatedOral200 mg
CapsuleOral400.000 mg
CapsuleOral400.0000 mg
CreamTopical7.500 g
SolutionOral2.0000 g
SolutionOral40.000 mg
SolutionParenteral100.000 mg
Aerosol; powder, for solutionRespiratory (inhalation)6 g / vial
LiquidIntravenous0.1 g/1mL
Powder, for solutionRespiratory (inhalation)
Injection, powder, for solutionParenteral6 g
Tablet, coatedOral200 mg
TabletOral200 mg
TabletOral400 mg
Unit descriptionCostUnit
Virazole 6 gm vial4512.21USD vial
Ribatab 600 mg tablet32.01USD tablet
Ribasphere 600 mg tablet24.88USD tablet
Ribavirin 600 mg tablet24.88USD tablet
Ribatab 400 mg tablet21.34USD tablet
Ribavirin 500 mg tablet20.74USD tablet
Ribasphere 400 mg tablet16.59USD tablet
Ribavirin 400 mg tablet16.59USD tablet
Copegus 200 mg tablet15.19USD tablet
Rebetol 200 mg capsule10.81USD capsule
Ribasphere 200 mg capsule10.33USD capsule
Ribavirin 200 mg capsule10.33USD capsule
Ribasphere 200 mg tablet8.29USD tablet
Ribavirin 200 mg tablet8.29USD tablet
Ribavirin powder3.21USD g
Rebetol 40 mg/ml Solution2.42USD ml
DrugBank does not sell nor buy drugs. Pricing information is supplied for informational purposes only.
Patent NumberPediatric ExtensionApprovedExpires (estimated)Region
CA2365412No2002-09-172018-12-21Canada flag
CA2287056No2000-08-152018-12-21Canada flag
US6150337No2000-11-212017-11-21US flag
US6172046Yes2001-01-092018-03-21US flag
US6177074Yes2001-01-232017-05-01US flag
US6461605Yes2002-10-082017-05-01US flag
US6472373Yes2002-10-292018-03-21US flag
US6524570Yes2003-02-252017-05-01US flag
US6790837Yes2004-09-142023-10-05US flag


Experimental Properties
melting point (°C)174-176 °CMSDS
water solubilitySolubleMSDS
Predicted Properties
Water Solubility33.2 mg/mLALOGPS
pKa (Strongest Acidic)11.88Chemaxon
pKa (Strongest Basic)-1.2Chemaxon
Physiological Charge0Chemaxon
Hydrogen Acceptor Count7Chemaxon
Hydrogen Donor Count4Chemaxon
Polar Surface Area143.72 Å2Chemaxon
Rotatable Bond Count3Chemaxon
Refractivity64.57 m3·mol-1Chemaxon
Polarizability22.18 Å3Chemaxon
Number of Rings2Chemaxon
Rule of FiveYesChemaxon
Ghose FilterNoChemaxon
Veber's RuleNoChemaxon
MDDR-like RuleNoChemaxon
Predicted ADMET Features
Human Intestinal Absorption+0.9852
Blood Brain Barrier+0.9381
Caco-2 permeable-0.7742
P-glycoprotein substrateNon-substrate0.7715
P-glycoprotein inhibitor INon-inhibitor0.9507
P-glycoprotein inhibitor IINon-inhibitor0.964
Renal organic cation transporterNon-inhibitor0.9574
CYP450 2C9 substrateNon-substrate0.8329
CYP450 2D6 substrateNon-substrate0.8426
CYP450 3A4 substrateNon-substrate0.6011
CYP450 1A2 substrateNon-inhibitor0.9045
CYP450 2C9 inhibitorNon-inhibitor0.9462
CYP450 2D6 inhibitorNon-inhibitor0.9442
CYP450 2C19 inhibitorNon-inhibitor0.9095
CYP450 3A4 inhibitorNon-inhibitor0.9535
CYP450 inhibitory promiscuityLow CYP Inhibitory Promiscuity0.9845
Ames testNon AMES toxic0.9133
BiodegradationNot ready biodegradable0.7406
Rat acute toxicity1.9876 LD50, mol/kg Not applicable
hERG inhibition (predictor I)Weak inhibitor0.9948
hERG inhibition (predictor II)Non-inhibitor0.919
ADMET data is predicted using admetSAR, a free tool for evaluating chemical ADMET properties. (23092397)


Mass Spec (NIST)
Not Available
SpectrumSpectrum TypeSplash Key
Predicted GC-MS Spectrum - GC-MSPredicted GC-MSsplash10-08nc-9320000000-385cc2e08cf140e0ecee
LC-MS/MS Spectrum - LC-ESI-QFT , negativeLC-MS/MSsplash10-03di-0900000000-92e2bd11ded2c95f3fbd
LC-MS/MS Spectrum - LC-ESI-QFT , negativeLC-MS/MSsplash10-03di-0900000000-109ebb69f722bb3a92d7
LC-MS/MS Spectrum - LC-ESI-QFT , negativeLC-MS/MSsplash10-03di-2900000000-c0d63d0633c304d466ca
LC-MS/MS Spectrum - LC-ESI-QFT , negativeLC-MS/MSsplash10-03xr-5900000000-c6f13aea6e263f2557f4
LC-MS/MS Spectrum - LC-ESI-QFT , negativeLC-MS/MSsplash10-02t9-9500000000-cefa4afc53cf92b724c3
LC-MS/MS Spectrum - LC-ESI-QFT , negativeLC-MS/MSsplash10-014i-9200000000-3a87882b304f3a9c9995
LC-MS/MS Spectrum - LC-ESI-QFT , positiveLC-MS/MSsplash10-03di-0900000000-d5e98a470d0e674937d2
LC-MS/MS Spectrum - LC-ESI-QFT , positiveLC-MS/MSsplash10-03di-0900000000-c659efd26af31b3b98dc
LC-MS/MS Spectrum - LC-ESI-QFT , positiveLC-MS/MSsplash10-03di-1900000000-56c00c62af197ae8eecb
LC-MS/MS Spectrum - LC-ESI-QFT , positiveLC-MS/MSsplash10-03di-2900000000-aa387f940aedc4b69874
LC-MS/MS Spectrum - LC-ESI-QFT , positiveLC-MS/MSsplash10-03di-3900000000-795b88d3d651082dccb4
Predicted MS/MS Spectrum - 10V, Positive (Annotated)Predicted LC-MS/MSsplash10-01ot-9700000000-41b200cea31fa7e0d322
Predicted MS/MS Spectrum - 10V, Negative (Annotated)Predicted LC-MS/MSsplash10-0006-0590000000-8fa7b654425015327db3
Predicted MS/MS Spectrum - 20V, Positive (Annotated)Predicted LC-MS/MSsplash10-0002-9300000000-d5fb82593e054440fc52
Predicted MS/MS Spectrum - 20V, Negative (Annotated)Predicted LC-MS/MSsplash10-00kf-9400000000-4f6ae50376ec39a61aa5
Predicted MS/MS Spectrum - 40V, Positive (Annotated)Predicted LC-MS/MSsplash10-0002-9710000000-bec507b3b864ac7abd45
Predicted MS/MS Spectrum - 40V, Negative (Annotated)Predicted LC-MS/MSsplash10-0006-9700000000-ad3b00322a8e0e84b983
Predicted 1H NMR Spectrum1D NMRNot Applicable
Predicted 13C NMR Spectrum1D NMRNot Applicable
Chromatographic Properties
Collision Cross Sections (CCS)
AdductCCS Value (Å2)Source typeSource
DarkChem Lite v0.1.0
DarkChem Lite v0.1.0
DeepCCS 1.0 (2019)
DarkChem Lite v0.1.0
DarkChem Lite v0.1.0
DeepCCS 1.0 (2019)
DarkChem Lite v0.1.0
DeepCCS 1.0 (2019)


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Pharmacological action
General Function
Rna binding
Specific Function
Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore pl...
Gene Name
Uniprot ID
Uniprot Name
Inosine-5'-monophosphate dehydrogenase 1
Molecular Weight
55405.365 Da
  1. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. [Article]
  2. Gish RG: Treating HCV with ribavirin analogues and ribavirin-like molecules. J Antimicrob Chemother. 2006 Jan;57(1):8-13. Epub 2005 Nov 17. [Article]
  3. McHutchison JG, Shiffman ML, Cheung RC, Gordon SC, Wright TL, Pottage JC Jr, McNair L, Ette E, Moseley S, Alam J: A randomized, double-blind, placebo-controlled dose-escalation trial of merimepodib (VX-497) and interferon-alpha in previously untreated patients with chronic hepatitis C. Antivir Ther. 2005;10(5):635-43. [Article]
  4. Leyssen P, De Clercq E, Neyts J: The anti-yellow fever virus activity of ribavirin is independent of error-prone replication. Mol Pharmacol. 2006 Apr;69(4):1461-7. Epub 2006 Jan 18. [Article]
Pharmacological action
General Function
Rna-directed rna polymerase activity
Specific Function
Displays RNA-directed RNA polymerase, mRNA guanylyl transferase, mRNA (guanine-N(7)-)-methyltransferase and poly(A) synthetase activities. The viral mRNA guanylyl transferase displays a different b...
Gene Name
Uniprot ID
Uniprot Name
RNA-directed RNA polymerase L
Molecular Weight
256380.115 Da
  1. Eriksson B, Helgstrand E, Johansson NG, Larsson A, Misiorny A, Noren JO, Philipson L, Stenberg K, Stening G, Stridh S, Oberg B: Inhibition of influenza virus ribonucleic acid polymerase by ribavirin triphosphate. Antimicrob Agents Chemother. 1977 Jun;11(6):946-51. doi: 10.1128/aac.11.6.946. [Article]
Pharmacological action
Curator comments
Ribavirin's effects on genome polyprotein may stem from its inhibition of the mRNA 2'-O-methyltransferase domain.
General Function
Structural molecule activity
Specific Function
Capsid protein C self-assembles to form an icosahedral capsid about 30 nm in diameter. The capsid encapsulates the genomic RNA.prM acts as a chaperone for envelope protein E during intracellular vi...
Gene Name
Not Available
Uniprot ID
Uniprot Name
Genome polyprotein
Molecular Weight
379216.195 Da
  1. Benarroch D, Egloff MP, Mulard L, Guerreiro C, Romette JL, Canard B: A structural basis for the inhibition of the NS5 dengue virus mRNA 2'-O-methyltransferase domain by ribavirin 5'-triphosphate. J Biol Chem. 2004 Aug 20;279(34):35638-43. doi: 10.1074/jbc.M400460200. Epub 2004 May 19. [Article]
  2. Chang J, Schul W, Butters TD, Yip A, Liu B, Goh A, Lakshminarayana SB, Alonzi D, Reinkensmeier G, Pan X, Qu X, Weidner JM, Wang L, Yu W, Borune N, Kinch MA, Rayahin JE, Moriarty R, Xu X, Shi PY, Guo JT, Block TM: Combination of alpha-glucosidase inhibitor and ribavirin for the treatment of dengue virus infection in vitro and in vivo. Antiviral Res. 2011 Jan;89(1):26-34. doi: 10.1016/j.antiviral.2010.11.002. Epub 2010 Nov 10. [Article]
  3. Pires de Mello CP, Drusano GL, Rodriquez JL, Kaushik A, Brown AN: Antiviral Effects of Clinically-Relevant Interferon-alpha and Ribavirin Regimens against Dengue Virus in the Hollow Fiber Infection Model (HFIM). Viruses. 2018 Jun 9;10(6). pii: v10060317. doi: 10.3390/v10060317. [Article]
Pharmacological action
General Function
Rna binding
Specific Function
Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore pl...
Gene Name
Uniprot ID
Uniprot Name
Inosine-5'-monophosphate dehydrogenase 2
Molecular Weight
55804.495 Da
  1. Markland W, McQuaid TJ, Jain J, Kwong AD: Broad-spectrum antiviral activity of the IMP dehydrogenase inhibitor VX-497: a comparison with ribavirin and demonstration of antiviral additivity with alpha interferon. Antimicrob Agents Chemother. 2000 Apr;44(4):859-66. [Article]
  2. Shah CP, Kharkar PS: Newer human inosine 5'-monophosphate dehydrogenase 2 (hIMPDH2) inhibitors as potential anticancer agents. J Enzyme Inhib Med Chem. 2018 Dec;33(1):972-977. doi: 10.1080/14756366.2018.1474211. [Article]
Influenza A virus (strain A/Beijing/11/1956 H1N1)
Pharmacological action
General Function
Rna-directed rna polymerase activity
Specific Function
RNA-dependent RNA polymerase which is responsible for replication and transcription of virus RNA segments. The transcription of viral mRNAs occurs by a unique mechanism called cap-snatching. 5' met...
Gene Name
Uniprot ID
Uniprot Name
RNA-directed RNA polymerase catalytic subunit
Molecular Weight
86534.5 Da
  1. Overington JP, Al-Lazikani B, Hopkins AL: How many drug targets are there? Nat Rev Drug Discov. 2006 Dec;5(12):993-6. [Article]
  2. Imming P, Sinning C, Meyer A: Drugs, their targets and the nature and number of drug targets. Nat Rev Drug Discov. 2006 Oct;5(10):821-34. [Article]
  3. Bougie I, Bisaillon M: Initial binding of the broad spectrum antiviral nucleoside ribavirin to the hepatitis C virus RNA polymerase. J Biol Chem. 2003 Dec 26;278(52):52471-8. Epub 2003 Oct 16. [Article]


Pharmacological action
General Function
Nucleotide binding
Specific Function
May have a critical role in the maintenance of a constant composition of intracellular purine/pyrimidine nucleotides in cooperation with other nucleotidases. Preferentially hydrolyzes inosine 5'-mo...
Gene Name
Uniprot ID
Uniprot Name
Cytosolic purine 5'-nucleotidase
Molecular Weight
64969.2 Da
  1. Wu JZ, Larson G, Walker H, Shim JH, Hong Z: Phosphorylation of ribavirin and viramidine by adenosine kinase and cytosolic 5'-nucleotidase II: Implications for ribavirin metabolism in erythrocytes. Antimicrob Agents Chemother. 2005 Jun;49(6):2164-71. [Article]
  2. Wallden K, Nordlund P: Structural basis for the allosteric regulation and substrate recognition of human cytosolic 5'-nucleotidase II. J Mol Biol. 2011 May 13;408(4):684-96. doi: 10.1016/j.jmb.2011.02.059. Epub 2011 Mar 17. [Article]
Pharmacological action
General Function
Poly(a) rna binding
Specific Function
ATP dependent phosphorylation of adenosine and other related nucleoside analogs to monophosphate derivatives. Serves as a potential regulator of concentrations of extracellular adenosine and intrac...
Gene Name
Uniprot ID
Uniprot Name
Adenosine kinase
Molecular Weight
40545.075 Da
  1. Wu JZ, Larson G, Walker H, Shim JH, Hong Z: Phosphorylation of ribavirin and viramidine by adenosine kinase and cytosolic 5'-nucleotidase II: Implications for ribavirin metabolism in erythrocytes. Antimicrob Agents Chemother. 2005 Jun;49(6):2164-71. [Article]
  2. Kumarapperuma SC, Sun Y, Jeselnik M, Chung K, Parker WB, Jonsson CB, Arterburn JB: Structural effects on the phosphorylation of 3-substituted 1-beta-D-ribofuranosyl-1,2,4-triazoles by human adenosine kinase. Bioorg Med Chem Lett. 2007 Jun 1;17(11):3203-7. Epub 2007 Mar 12. [Article]


Pharmacological action
General Function
Pyrimidine- and adenine-specific:sodium symporter activity
Specific Function
Sodium-dependent, pyrimidine- and purine-selective. Involved in the homeostasis of endogenous nucleosides. Exhibits the transport characteristics of the nucleoside transport system cib or N3 subtyp...
Gene Name
Uniprot ID
Uniprot Name
Solute carrier family 28 member 3
Molecular Weight
76929.61 Da
  1. Yamamoto T, Sugawara M, Kikukawa T, Miyauchi S, Yamaguchi M, Tero A, Takagi S, Nakagaki T: Kinetic study of anti-viral ribavirin uptake mediated by hCNT3 and hENT1 in Xenopus laevis oocytes. Biophys Chem. 2010 Mar;147(1-2):59-65. doi: 10.1016/j.bpc.2009.12.012. Epub 2010 Jan 6. [Article]
Pharmacological action
General Function
Nucleoside transmembrane transporter activity
Specific Function
Mediates both influx and efflux of nucleosides across the membrane (equilibrative transporter). It is sensitive (ES) to low concentrations of the inhibitor nitrobenzylmercaptopurine riboside (NBMPR...
Gene Name
Uniprot ID
Uniprot Name
Equilibrative nucleoside transporter 1
Molecular Weight
50218.805 Da
  1. Yamamoto T, Sugawara M, Kikukawa T, Miyauchi S, Yamaguchi M, Tero A, Takagi S, Nakagaki T: Kinetic study of anti-viral ribavirin uptake mediated by hCNT3 and hENT1 in Xenopus laevis oocytes. Biophys Chem. 2010 Mar;147(1-2):59-65. doi: 10.1016/j.bpc.2009.12.012. Epub 2010 Jan 6. [Article]
  2. Fukuchi Y, Furihata T, Hashizume M, Iikura M, Chiba K: Characterization of ribavirin uptake systems in human hepatocytes. J Hepatol. 2010 Apr;52(4):486-92. doi: 10.1016/j.jhep.2010.01.011. Epub 2010 Feb 4. [Article]

Drug created at June 13, 2005 13:24 / Updated at July 20, 2024 06:39