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Cidofovir
Also known as: 113852-37-2, Vistide, Hpmpc, Cidofovir anhydrous, (s)-hpmpc, Gs-504
Molecular Formula
C8H14N3O6P
Molecular Weight
279.19  g/mol
InChI Key
VWFCHDSQECPREK-LURJTMIESA-N
FDA UNII
768M1V522C

An acyclic nucleoside phosphonate that acts as a competitive inhibitor of viral DNA polymerases. It is used in the treatment of RETINITIS caused by CYTOMEGALOVIRUS INFECTIONS and may also be useful for treating HERPESVIRUS INFECTIONS.
Cidofovir anhydrous is a Cytomegalovirus Nucleoside Analog DNA Polymerase Inhibitor. The mechanism of action of cidofovir anhydrous is as a DNA Polymerase Inhibitor.
1 2D Structure

Cidofovir

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
[(2S)-1-(4-amino-2-oxopyrimidin-1-yl)-3-hydroxypropan-2-yl]oxymethylphosphonic acid
2.1.2 InChI
InChI=1S/C8H14N3O6P/c9-7-1-2-11(8(13)10-7)3-6(4-12)17-5-18(14,15)16/h1-2,6,12H,3-5H2,(H2,9,10,13)(H2,14,15,16)/t6-/m0/s1
2.1.3 InChI Key
VWFCHDSQECPREK-LURJTMIESA-N
2.1.4 Canonical SMILES
C1=CN(C(=O)N=C1N)CC(CO)OCP(=O)(O)O
2.1.5 Isomeric SMILES
C1=CN(C(=O)N=C1N)C[C@@H](CO)OCP(=O)(O)O
2.2 Other Identifiers
2.2.1 UNII
768M1V522C
2.3 Synonyms
2.3.1 MeSH Synonyms

1. 1-((3-hydroxy-2-phosphonylmethoxy)propyl)cytosine

2. 1-(3-hydroxy-2-phosphonylmethoxypropyl)cytosine

3. Cidofovir Anhydrous

4. Cidofovir Sodium

5. Cidofovir, (+-)-isomer

6. Cidofovir, (r)-isomer

7. Cidofovir, Sodium Salt

8. Gs 504

9. Gs-504

10. Gs504

11. Hpmpc

12. Vistide

2.3.2 Depositor-Supplied Synonyms

1. 113852-37-2

2. Vistide

3. Hpmpc

4. Cidofovir Anhydrous

5. (s)-hpmpc

6. Gs-504

7. Anhydrous Cidofovir

8. Cidofovir [inn]

9. Cidofovir (vistide)

10. Cidofovir Hydrate

11. Gs 0504

12. (s)-1-(3-hydroxy-2-phosphonomethoxypropyl)cytosine

13. Cdv

14. [1-(4-amino-2-oxo-pyrimidin-1-yl)-3-hydroxy-propan-2-yl]oxymethylphosphonic Acid

15. Gs-0504

16. (s)-1-[3-hydroxy-2-(phosphonylmethoxy)propyl]cytosine

17. (s)-(((1-(4-amino-2-oxopyrimidin-1(2h)-yl)-3-hydroxypropan-2-yl)oxy)methyl)phosphonic Acid

18. Chebi:3696

19. Hpmpc Dihydrate

20. ({[(2s)-1-(4-amino-2-oxopyrimidin-1(2h)-yl)-3-hydroxypropan-2-yl]oxy}methyl)phosphonic Acid

21. (s)-1-[3-hydroxy-2-(phosphonomethoxy)propyl]cytosine

22. 768m1v522c

23. Nsc-742135

24. Ncgc00184994-01

25. Phosphonic Acid, ((2-(4-amino-2-oxo-1(2h)-pyrimidinyl)-1-(hydroxymethyl)ethoxy)methyl)-, (s)-

26. 1-(s)-[3-hydroxy-2-(phosphonomethoxy)propyl]cytosine

27. 1-[(s)-3-hydroxy-2-(phosphonomethoxy)propyl]cytosine

28. Cidofovir (anhydrous)

29. Cidofovir Hydrate (1:2)

30. Cidofovirum

31. Forvade

32. (s)-(3-(4-amino-2-oxopyrimidin-1(2h)-yl)-1-hydroxypropan-2-yloxy)methylphosphonic Acid

33. [(s)-2-(4-amino-2-oxo-2h-pyrimidin-1-yl)-1-hydroxymethyl-ethoxymethyl]-phosphonic Acid

34. ({[(2s)-1-(4-amino-2-oxo-1,2-dihydropyrimidin-1-yl)-3-hydroxypropan-2-yl]oxy}methyl)phosphonic Acid

35. Hsdb 7115

36. Gs504

37. 1-((s)-3-hydroxy-2-(phosphonomethoxy)propyl)cytosine

38. Cidofovir Gel

39. Unii-768m1v522c

40. Cidofovir,vistide

41. [[(s)-2-(4-amino-2-oxo-1(2h)-pyrimidinyl)-1-(hydroxymethyl)ethoxy]methyl]phosphonic Acid

42. Cidofovir(vistide)

43. (((s)-2-(4-amino-2-oxo-1(2h)-pyrimidinyl)-1-(hydroxymethyl)ethoxy)methyl)phosphonic Acid

44. Forvade (tm)

45. Cidofovir [mi]

46. Cidofovir [hsdb]

47. Chembl152

48. Cidofovir [who-dd]

49. Cidofovir Anhydrous- Bio-x

50. Schembl3948

51. Dsstox_cid_23734

52. Dsstox_rid_80069

53. Dsstox_gsid_43734

54. (2s)-3-hydroxy-2-phosphonylmethoxypropyl-cytosine

55. Mls003915629

56. (s)-1-[3-hydroxy-2-(phosphonylmethoxy)-propyl]cytosine

57. Dtxsid3043734

58. Bdbm31915

59. 1-[(s)-3-hydroxy-2-(phosphonomethoxy)propyl]-cytosine Dihydrate

60. Bcp03734

61. Ex-a4209

62. Zinc1530600

63. Tox21_112994

64. Mfcd00866936

65. Nsc742135

66. S1516

67. Akos005145721

68. Akos015854828

69. Ac-1666

70. Bcp9000528

71. Ccg-267235

72. Cs-1669

73. Db00369

74. Gs-6438

75. (s)-2-(4-amino-2-oxo-1(2h)-pyrimidinyl-1-(hydroxymethyl)ethoxy)methyl Phosphonic Acid

76. [(1s)-1-[(4-amino-2-oxo-pyrimidin-1-yl)methyl]-2-hydroxy-ethoxy]methylphosphonic Acid

77. Ncgc00184994-02

78. Ncgc00184994-03

79. Bc164304

80. Hy-17438

81. Smr002544687

82. Bcp0726000147

83. Cas-113852-37-2

84. Ab01566823_01

85. 394c661

86. Q423445

87. Sr-01000931969

88. J-502695

89. Sr-01000931969-2

90. (s)-(((1-(4-amino-2-oxopyrimidin-1(2h)-yl)-3-hydroxypropan-2-yl)oxy)methyl)phosphonicacid

91. ({[(s)-1-(4-amino-2-oxo-1,2-dihydropyrimidin-1-yl)-3-hydroxypropan-2-yl]oxy}methyl)phosphonic Acid

92. L8p

93. Phosphonic Acid, [[(1s)-2-(4-amino-2-oxo-1(2h)-pyrimidinyl)-1-(hydroxymethyl)ethoxy]methyl]-

94. Phosphonic Acid,[[(1s)-2-(4-amino-2-oxo-1(2h)-pyrimidinyl)-1-(hydroxymethyl)ethoxy]methyl]-

2.4 Create Date
2005-06-24
3 Chemical and Physical Properties
Molecular Weight 279.19 g/mol
Molecular Formula C8H14N3O6P
XLogP3-3.6
Hydrogen Bond Donor Count4
Hydrogen Bond Acceptor Count6
Rotatable Bond Count6
Exact Mass279.06202217 g/mol
Monoisotopic Mass279.06202217 g/mol
Topological Polar Surface Area146 Ų
Heavy Atom Count18
Formal Charge0
Complexity417
Isotope Atom Count0
Defined Atom Stereocenter Count1
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count1
4 Drug and Medication Information
4.1 Drug Information
1 of 4  
Drug NameCidofovir
PubMed HealthCidofovir (Injection)
Drug ClassesAntiviral
Drug LabelThe chemical name of cidofovir is 1-[(S)-3-hydroxy-2-(phosphonomethoxy)propyl]cytosine dihydrate (HPMPC), with the molecular formula of C8H14N3O6P2H2O and a molecular weight of 315.22 (279.19 for anhydrous). The chemical structure is:Cidofovir is...
Active IngredientCidofovir
Dosage FormInjectable
RouteInjection
Strengtheq 75mg base/ml
Market StatusPrescription
CompanyEmcure Pharms; Mylan Institutional

2 of 4  
Drug NameVistide
PubMed HealthCidofovir (Injection)
Drug ClassesAntiviral
Drug LabelVISTIDE is the brand name for cidofovir injection. The chemical name of cidofovir is 1-[(S)-3-hydroxy-2-(phosphonomethoxy)propyl]cytosine dihydrate (HPMPC), with the molecular formula of C8H14N3O6P2H2O and a molecular weight of 315.22 (279.19 fo...
Active IngredientCidofovir
Dosage FormInjectable
RouteInjection
Strengtheq 75mg base/ml
Market StatusPrescription
CompanyGilead Sciences

3 of 4  
Drug NameCidofovir
PubMed HealthCidofovir (Injection)
Drug ClassesAntiviral
Drug LabelThe chemical name of cidofovir is 1-[(S)-3-hydroxy-2-(phosphonomethoxy)propyl]cytosine dihydrate (HPMPC), with the molecular formula of C8H14N3O6P2H2O and a molecular weight of 315.22 (279.19 for anhydrous). The chemical structure is:Cidofovir is...
Active IngredientCidofovir
Dosage FormInjectable
RouteInjection
Strengtheq 75mg base/ml
Market StatusPrescription
CompanyEmcure Pharms; Mylan Institutional

4 of 4  
Drug NameVistide
PubMed HealthCidofovir (Injection)
Drug ClassesAntiviral
Drug LabelVISTIDE is the brand name for cidofovir injection. The chemical name of cidofovir is 1-[(S)-3-hydroxy-2-(phosphonomethoxy)propyl]cytosine dihydrate (HPMPC), with the molecular formula of C8H14N3O6P2H2O and a molecular weight of 315.22 (279.19 fo...
Active IngredientCidofovir
Dosage FormInjectable
RouteInjection
Strengtheq 75mg base/ml
Market StatusPrescription
CompanyGilead Sciences

4.2 Therapeutic Uses

Cidofovir is used for the treatment of cytomegalovirus (CMV) retinitis in patients with acquired immunodeficiency syndrome (AIDS).

McEvoy, G.K. (ed.). American Hospital Formulary Service - Drug Information 2003. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2003 (Plus Supplements)., p. 538


Cidofovir has been used for the management of acyclovir-resistant herpes simplex virus (HSV-1 and HSV-2) infections in immunocompromised patients.

McEvoy, G.K. (ed.). American Hospital Formulary Service - Drug Information 2003. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2003 (Plus Supplements)., p. 539


The role, if any, of cidofovir in the treatment of smallpox remains to be determined. Cidofovir is active in vitro against poxviruses, including variola virus (the causative agent of smallpox) and has in vivo activity in mice against cowpox and vaccinia virus. Although limited in vitro and in vivo data suggest that cidofovir might prove useful in preventing smallpox infection if administered within 1-2 days after exposure, there currently is no evidence that the antiviral would be more effective than vaccination in this early period.

McEvoy, G.K. (ed.). American Hospital Formulary Service - Drug Information 2003. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2003 (Plus Supplements)., p. 539


Topical cidofovir gel eliminates virus shedding and lesions in some HIV-infected patients with acyclovir-resistant mucocutaneous HSV infections and has been use in treating anogenital warts and molluscum contagiosum in immunocompromised patients and cervical intraepithelial neoplasia in women. Intralesional cidofovir induces remission in adults or chlidren with respiratory papillomatosis.

Hardman, J.G., L.E. Limbird, P.B., A.G. Gilman. Goodman and Gilman's The Pharmacological Basis of Therapeutics. 10th ed. New York, NY: McGraw-Hill, 2001., p. 1322


For more Therapeutic Uses (Complete) data for CIDOFOVIR (15 total), please visit the HSDB record page.


4.3 Drug Warning

Placement of a ganciclovir ocular implant in patients receiving IV cidofovir has resulted in profound hypotomy in some patients, and some clinicians suggest that IV cidofovir not be administered within one month before or after placement of a ganciclovir ocular implant.

McEvoy, G.K. (ed.). American Hospital Formulary Service - Drug Information 2003. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2003 (Plus Supplements)., p. 539


.... Because evidence from clinical trials indicates that previous exposure to foscarnet may increase the risk of cidofovir-related nephrotoxicity, patients treated previously with foscarnet should receive cidofovir only when the potential benefits exceed the possible risks.

McEvoy, G.K. (ed.). American Hospital Formulary Service - Drug Information 2003. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2003 (Plus Supplements)., p. 539


Patients should be advised that cidofovir therapy is not curative, and that progression of their retinitis is possible during or following therapy with the drug.

McEvoy, G.K. (ed.). American Hospital Formulary Service - Drug Information 2003. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2003 (Plus Supplements)., p. 538


Safety and efficacy of cidofovir in geriatric patients older than 60 years of age have not been established. Because geriatric patients frequently have reduced glomerular filtration, particular attention should be paid to monitoring renal function prior to and during cidofovir therapy in this age group, and doses of the drug should be modified in response to changes in renal function that occur during therapy.

McEvoy, G.K. (ed.). American Hospital Formulary Service - Drug Information 2003. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2003 (Plus Supplements)., p. 539


For more Drug Warnings (Complete) data for CIDOFOVIR (20 total), please visit the HSDB record page.


4.4 Drug Indication

For the treatment of CMV retinitis in patients with acquired immunodeficiency syndrome (AIDS)


FDA Label


Vistide is indicated for the treatment of cytomegalovirus retinitis in patients with acquired immunodeficiency syndrome (AIDS) and without renal dysfunction. Vistide should be used only when other agents are considered unsuitable.


5 Pharmacology and Biochemistry
5.1 Pharmacology

Cidofovir is a new anti-viral drug. It is classified as a nucleotide analogue and is active against herpes cytomegalovirus (CMV) retinitis infection. Most adults are infected with CMV. Cidofovir suppresses cytomegalovirus (CMV) replication by selective inhibition of viral DNA synthesis.


5.2 MeSH Pharmacological Classification

Antiviral Agents

Agents used in the prophylaxis or therapy of VIRUS DISEASES. Some of the ways they may act include preventing viral replication by inhibiting viral DNA polymerase; binding to specific cell-surface receptors and inhibiting viral penetration or uncoating; inhibiting viral protein synthesis; or blocking late stages of virus assembly. (See all compounds classified as Antiviral Agents.)


Enzyme Inhibitors

Compounds or agents that combine with an enzyme in such a manner as to prevent the normal substrate-enzyme combination and the catalytic reaction. (See all compounds classified as Enzyme Inhibitors.)


5.3 FDA Pharmacological Classification
5.3.1 Active Moiety
CIDOFOVIR ANHYDROUS
5.3.2 FDA UNII
768M1V522C
5.3.3 Pharmacological Classes
DNA Polymerase Inhibitors [MoA]; Nucleoside Analog [EXT]; Cytomegalovirus Nucleoside Analog DNA Polymerase Inhibitor [EPC]
5.4 ATC Code

J05AB12


J - Antiinfectives for systemic use

J05 - Antivirals for systemic use

J05A - Direct acting antivirals

J05AB - Nucleosides and nucleotides excl. reverse transcriptase inhibitors

J05AB12 - Cidofovir


5.5 Absorption, Distribution and Excretion

Absorption

100%


Volume of Distribution

537 126 mL/kg [VISTIDE ADMINISTERED WITHOUT PROBENECID]

410 102 mL/kg [VISTIDE ADMINISTERED WITH PROBENECID]


Clearance

179 +/- 23.1 mL/min/1.73 m2 [WITHOUT PROBENECID]

148 +/- 38.8 mL/min/1.73 m2 [WITH PROBENECID]


Volume of distribution is 537 ml/kg without concurrent probenecid administration and 410 ml/kg with concurrent probenecid administration.

MICROMEDEX Thomson Health Care. USPDI - Drug Information for the Health Care Professional. 22nd ed. Volume 1. MICROMEDEX Thomson Health Care, Greenwood Village, CO. 2002. Content Reviewed and Approved by the U.S. Pharmacopeial Convention, Inc., p. 879


Concentrations of cidofovir were undetectable 15 minutes after the end of a 1 hour infusion in one patient who had a corresponding serum concentration of 8.7 ug/mL.

MICROMEDEX Thomson Health Care. USPDI - Drug Information for the Health Care Professional. 22nd ed. Volume 1. MICROMEDEX Thomson Health Care, Greenwood Village, CO. 2002. Content Reviewed and Approved by the U.S. Pharmacopeial Convention, Inc., p. 879


Renal (without concurrent probenecid administration): Approximately 80 to 100% of an administered cidofovir dose was recovered unchanged in the urine within 24 hours.

MICROMEDEX Thomson Health Care. USPDI - Drug Information for the Health Care Professional. 22nd ed. Volume 1. MICROMEDEX Thomson Health Care, Greenwood Village, CO. 2002. Content Reviewed and Approved by the U.S. Pharmacopeial Convention, Inc., p. 879


Cidofovir is dianionic at physiological pH and have low oral bioavailability in animals and humans. After intravenous administration to HIV-infected patients, the pharmacokinetics of /cidofovir is/ independent of dose and are consistent with preclinical data. Systemic exposure is proportional to the intravenous dose and /the drug is cleared/ by the kidney and excreted extensively as unchanged drug in the urine. Intracellular activation of a small fraction (< 10%) of the dose by cellular kinases leads to prolonged antiviral effects that are not easily predicted from conventional pharmacokinetic studies. The observed rate of elimination of cidofovir ... from the serum may not reflect the true duration of action of these drugs, since the antiviral effect is dependent on concentrations of the active phosphorylated metabolites that are present within cells. For /cidofovir/, > 90% of an iv dose is recovered unchanged in the urine over 24 hours.

PMID:10092959 Cundy KC; Clin Pharmacokinet 36 (2): 127-43 (1999)


This study was undertaken to evaluate the intravitreal and plasma concentrations of cidofovir (HPMPC) after intravitreal and intravenous administration in AIDS patients with cytomegalovirus retinitis. Cohort series; undiluted vitreous and blood were collected from 9 patients at the time of pars plana vitrectomy. Vitreous samples from 9 eyes of 9 patients and plasma samples from 4 patients were assayed with high-performance liquid chromatography to determine cidofovir levels. The only eye that had a detectable vitreous concentration (673.7 ng/ml) was injected with 20 microg 24 hours prior to the surgery. The remaining samples including plasma were below the detection point of the assay (100 ng/ml) and were injected between 5 and 40 days prior to sampling. The intravitreal concentration of cidofovir in humans is consistent with pharmacokinetics data in laboratory animals, and suggests that the long duration of antiviral effect (1-3 months) in clinical trials is due to a prolonged intracellular half-life in retinal tissue.

PMID:9572540 Taskintuna I et al; J Ocul Pharmacol Ther 14 (2): 147-51 (1998)


5.6 Metabolism/Metabolites

Cidofovir is converted via cellular enzymes to the pharmacologically active diphosphate metabolite ... .

McEvoy, G.K. (ed.). American Hospital Formulary Service - Drug Information 2003. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2003 (Plus Supplements)., p. 540


This study was designed to evaluate the intraocular distribution and metabolism of the antiviral nucleotide analogs cidofovir and cyclic 1-[(S)-3-hydroxy-2-(phosphonomethoxy) propyl]cytosine (HPMPC) in New Zealand white rabbits following intravitreal administration. ...Male rabbits received either 14C-cidofovir or 14C-cyclic HPMPC by intravitreal injection into both eyes (50 micrograms/eye, 11 microCi/eye). Two animals/group were sacrificed at 24, 48, 72 or 240 hr post-dose. Ocular tissues, kidney and liver were oxidized to determine total radioactivity and metabolites were determined by HPLC. ...At 24 hr post-dose, total radioactivity was 9.96 and 5.18 micrograms-equiv/g for cidofovir and cyclic HPMPC, respectively, in vitreous and 20.9 and 3.54 micrograms-equiv/g, respectively, in retina. Although the initial vitreal clearance was 2-fold faster for the cyclic analog, the estimated terminal elimination half-lives in vitreous (42 hr) and in retina (66-77 hr) were similar for both drugs. By 240 hr post-dose, radioactivity in all ocular tissues was approx ten-fold higher for cidofovir. Radioactivity in vitreous at 240 hr after intravitreal dosing with either drug contained cidofovir, cyclic HPMPC and cidofovir-phosphocholine. ...The long retinal half-life observed presumably reflects formation of phosphorylated cidofovir within retinal cells. Cidofovir achieved a ten-fold higher level of phosphorylated drug in retina than cyclic HPMPC. Therefore, intravitreal cidofovir may be expected to suppress progression of retinitis for a longer period than an equivalent intravitreal dose of cyclic HPMPC. The intravitreal half-life of cidofovir was 20-fold longer than that of ganciclovir in the same animal model.

PMID:8670758 Cundy KC et al; Curr Eye Res 15 (5): 569-76 (1996)


Pyrimidine nucleoside monophosphate kinase converts cidofovir to cidofovir monophosphate, which is further converted to the diphosphate and cidofovir phosphate-choline via other cellular enzymes.

McEvoy, G.K. (ed.). American Hospital Formulary Service - Drug Information 2003. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2003 (Plus Supplements)., p. 540


5.7 Biological Half-Life

2.4 to 3.2 hours


...Male rabbits received either 14C-cidofovir ...by intravitreal injection into both eyes (50 micrograms/eye...). ...The estimated terminal elimination half-lives /were/ in vitreous (42 hr) and in retina (66-77 hr)... .

PMID:8670758 Cundy KC et al; Curr Eye Res 15 (5): 569-76 (1996)


...Levels of cidofovir in serum following iv infusion were dose proportional over the dose range of 1.0-10.0 mg/kg bw and declined biexponentially with an overall mean +/- standard deviation terminal half-life of 2.6 +/- 1.2 hr (n=25).

PMID:7574510 Full text: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC162721 Cundy KC et al; Antimicrob Agents Chemother 39 (6): 1247-52 (1995)


5.8 Mechanism of Action

Cidofovir acts through the selective inhibition of viral DNA polymerase.Biochemical data support selective inhibition of CMV DNA polymerase by cidofovir diphosphate, the active intracellular metabolite of cidofovir. Cidofovir diphosphate inhibits herpesvirus polymerases at concentrations that are 8- to 600-fold lower than those needed to inhibit human cellular DNA polymerase alpha, beta, and gamma(1,2,3). Incorporation of cidofovir into the growing viral DNA chain results in reductions in the rate of viral DNA synthesis.


Cidofovir diphosphate exerts its antiviral effect by interfering with DNA synthesis and inhibiting viral replication. The inhibitory activity of cidofovir diphosphate is highly selective because of its greater affinity for viral DNA polymerases than for human DNA polymerases. /Cidofovir diphosphate/

McEvoy, G.K. (ed.). American Hospital Formulary Service - Drug Information 2003. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2003 (Plus Supplements)., p. 540


Pyrimidine nucleoside monophosphate kinase converts cidofovir to cidofovir monophosphate, which is further converted to the diphosphate and cidofovir phosphate-choline via other cellular enzymes. Cidofovir diphosphate stop replication of viral DNA by competitive inhibition of viral DNA polymerase, incorporation and termination of the growing viral DNA chain, and inactivation of the viral DNA polymerase. /Cidofovir diphosphate/

McEvoy, G.K. (ed.). American Hospital Formulary Service - Drug Information 2003. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2003 (Plus Supplements)., p. 540


Cidofovir /is an/ ... acyclic phosphonate analog of deoxynucleoside monophosphate. /This cmpd/ undergoes intracellular activation to form diphosphates that are potent inhibitors of viral DNA polymerases. Cidofovir has broad spectrum antiviral activity against herpesviruses, papillomaviruses and poxviruses.

PMID:10092959 Cundy KC; Clin Pharmacokinet 36 (2): 127-43 (1999)


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