DrugPatentWatch Database Preview

VIAGRA Drug Profile

Which patents cover Viagra, and when can generic versions of Viagra launch?

Viagra is a drug marketed by Pfizer Inc and is included in one NDA. There is one patent protecting this drug and two Paragraph IV challenges.

The generic ingredient in VIAGRA is sildenafil citrate. There are twenty drug master file entries for this compound. Forty suppliers are listed for this compound. Additional details are available on the sildenafil citrate profile page.

Summary for VIAGRA

US Patents:	1
Applicants:	1
NDAs:	1
Suppliers / Packagers:	11
Bulk Api Vendors:	71
Clinical Trials:	121
Patent Applications:	4,541
Formulation / Manufacturing:	see details
Drug Prices:	Drug price information for VIAGRA
Patent Litigation and PTAB cases:	See patent lawsuits and PTAB cases for VIAGRA
DailyMed Link:	VIAGRA at DailyMed

Drug patent expirations by year for VIAGRA

Pharmacology for VIAGRA

Drug Class	Phosphodiesterase 5 Inhibitor
Mechanism of Action	Phosphodiesterase 5 Inhibitors

Medical Subject Heading (MeSH) Categories for VIAGRA

Phosphodiesterase 5 Inhibitors
Urological Agents
Vasodilator Agents

Synonyms for VIAGRA

1-((3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo(4,3-d)pyrimidin-5-yl)-4-ethoxyphenyl)sulfonyl)-4-methylpiperazine
1-((3-(6,7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo(4,3-d)pyrimidin-5-yl)-4-ethoxyphenyl)sulfonyl)-4-methylpiperazine citrate
1-[[3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methylpiperazine
139755-83-2
171599-83-0 (citrate)
1udt
1xos
2h42
3M7OB98Y7H
4-((4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydr
5-?[2-?ETHOXY-?5-?[(4-?METHYL-?1-?PIPERAZINYL)SULFONYL]PHENYL]-?1,?6-?DIHYDRO-?1-?METHYL-?3-?PROPYL-?7H-?PYRAZOLO[4,?3-?D]PYRIMIDIN-?7-?ONE
5-(2-ethoxy-5-((4-methylpiperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
5-(2-Ethoxy-5-((4-methylpiperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one
5-(2-ethoxy-5-(4-methylpiperazin-1-ylsulfonyl)phenyl)-1-methyl-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one
5-[2-ethoxy-5-(4-methyl-1-piperazinylsulfonyl)phenyl]-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
5-[2-Ethoxy-5-(4-methyl-piperazine-1-sulfonyl)-phenyl]-1-methyl-3-propyl-1,6-dihydro-pyrazolo[4,3-d]pyrimidin-7-one (Sildenafil or Viagra)
5-[2-Ethoxy-5-(4-methyl-piperazine-1-sulfonyl)-phenyl]-1-methyl-3-propyl-1,6-dihydro-pyrazolo[4,3-d]pyrimidin-7-one(Sildenafil)
5-[2-ethoxy-5-(4-methylpiperazin-1-yl)sulfonyl-phenyl]-1-methyl-3-propyl-4H-pyrazolo[4,3-d]pyrimidin-7-one
5-[2-ethoxy-5-(4-methylpiperazin-1-yl)sulfonyl-phenyl]-1-methyl-3-propyl-6H-pyrazolo[4,3-d]pyrimidin-7-one
5-[2-ethoxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-4H-pyrazolo[4,3-d]pyrimidin-7-one
5-[2-ethoxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-6H-pyrazolo[4,3-d]pyrimidin-7-one
5-[2-Ethoxy-5-(4-methylpiperazin-1-ylsulfonyl)phenyl]-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
5-[2-Ethoxy-5-(4-methylpiperazin-1-ylsulfonyl)phenyl]-1-methyl-3-n-propyl-1.6-dihydro-7H-pyrazolo[4,3-d]Pyrimidin-7-one
5-[2-ethoxy-5-(4-methylpiperazine-1-sulfonyl)phenyl]-1-methyl-3-propyl-1H,4H,7H-pyrazolo[4,3-d]pyrimidin-7-one
5-[2-ethoxy-5-(4-methylpiperazinylsulfonyl)phenyl]-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo(4,3-d]pyrimidin-7-one
5-[2-ethoxy-5-(4-methylpiperazinylsulfonyl)phenyl]-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
5-[2-Ethoxy-5-[(4-methyl-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one
5-{2-(ethyloxy)-5-[(4-methylpiperazin-1-yl)sulfonyl]phenyl}-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
5-{2-ethoxy-5-[(4-methylpiperazin-1-yl)sulfonyl]phenyl}-1-methyl-3-propyl-1,4-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
5-{2-ethoxy-5-[(4-methylpiperazin-1-yl)sulfonyl]phenyl}-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
5-{2-ethoxy-5-[(4-methylpiperazin-1-yl)sulfonyl]phenyl}-1-methyl-3-propyl-1H,4H,7H-pyrazolo[4,3-d]pyrimidin-7-one
5-{2-ETHOXY-5-[(4-METHYLPIPERAZIN-1-YL)SULFONYL]PHENYL}-1-METHYL-3-PROPYL-1H,6H,7H-PYRAZOLO[4,3-D]PYRIMIDIN-7-ONE
5-{2-ethoxy-5-[(4-methylpiperazine-1-)sulfonyl]phenyl}-1-methyl-3-propyl-1H,6H,7H-pyrazolo[4,3-d]pyrimidin-7-one
755S832
AB00052444_04
AB00052444_05
AB00052444-02
AB00052444-03
AB0015440
AC-938
AC1L1JUI
ACT02662
AKOS008901403
AKOS025397193
Ambap139755-83-2
AN-15436
Aphrodil
Aphrodil (TN)
BAS 04213629
BC202768
BDBM14390
BIDD:GT0352
BNRNXUUZRGQAQC-UHFFFAOYSA-N
BRD-K50128260-001-01-6
BRD-K79759585-001-02-1
BSPBio_003424
C07259
C22H30N6O4S
Cambridge id 7030299
Caverta
CCG-21806
CCG-39076
CHEBI:9139
CHEMBL192
CS-1577
D08514
D08KTT
D0Z7ZM
DB00203
DivK1c_006894
DTXSID6023579
FT-0601554
GTPL4743
HE069775
HE160851
HE309644
HMS1684K08
HMS1922B19
HMS2089M12
HMS2093O17
HMS2233L22
HMS3372N07
HSDB 7305
HY-15025
I06-0023
J-007309
Jsp002373
KBio1_001838
KBio2_002035
KBio2_004603
KBio2_007171
KBio3_002927
KBioGR_001052
KBioSS_002035
KS-00000XMX
LS-111655
M901
MCULE-2481702478
MFCD00867528
MLS001240224
MLS001304737
MLS006011565
MolPort-002-885-861
mysildecard
NCGC00095099-01
NCGC00095099-02
NCGC00095099-03
NCGC00095099-04
NCGC00159496-02
NCX-911
Piperazine, 1-((3-(4,7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo(4,3-d)pyrimidin-5-yl)-4-ethoxyphenyl)sulfonyl)-4-methyl-
Revatio
Revatio (TN)
Rhucin
Rhucin (TN)
s4684
SBI-0051920.P002
SC-83326
SCHEMBL1895
SCHEMBL5795456
SCHEMBL8100377
sildenafil
Sildenafil (INN)
Sildenafil [INN:BAN]
Sildenafil 1.0 mg/ml in Methanol
Sildenafil solution, 1.0 mg/mL in methanol, ampule of 1 mL, certified reference material
Sildenafil#
SMR000752512
SMR004703325
SPBio_001775
SpecPlus_000798
Spectrum_001555
SPECTRUM1504099
Spectrum2_001648
Spectrum3_001892
Spectrum4_000586
Spectrum5_001508
SR-01000504734
SR-01000504734-1
STL483201
STL483720
UK 92480-10
UK-92,480-10
UK-92480
UNII-3M7OB98Y7H
Viagra (TN)
Vizarsin
W-2194
Z1522567175
ZINC19796168

US Patents and Regulatory Information for VIAGRA

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Glossary

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Pfizer Inc	VIAGRA	sildenafil citrate	TABLET;ORAL	020895-001	Mar 27, 1998	AB	RX	Yes	No	➤ Sign Up	➤ Sign Up			Y	➤ Sign Up
Pfizer Inc	VIAGRA	sildenafil citrate	TABLET;ORAL	020895-002	Mar 27, 1998	AB	RX	Yes	No	➤ Sign Up	➤ Sign Up			Y	➤ Sign Up
Pfizer Inc	VIAGRA	sildenafil citrate	TABLET;ORAL	020895-003	Mar 27, 1998	AB	RX	Yes	Yes	➤ Sign Up	➤ Sign Up			Y	➤ Sign Up
Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration

Expired US Patents for VIAGRA

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	Patent No.	Patent Expiration
Pfizer Inc	VIAGRA	sildenafil citrate	TABLET;ORAL	020895-001	Mar 27, 1998	➤ Sign Up	➤ Sign Up
Pfizer Inc	VIAGRA	sildenafil citrate	TABLET;ORAL	020895-003	Mar 27, 1998	➤ Sign Up	➤ Sign Up
Pfizer Inc	VIAGRA	sildenafil citrate	TABLET;ORAL	020895-002	Mar 27, 1998	➤ Sign Up	➤ Sign Up
Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	Patent No.	Patent Expiration

Paragraph IV (Patent) Challenges for VIAGRA

Drugname	Dosage	Strength	RLD	Date
➤ Subscribe	Tablets	25 mg and 50 mg	➤ Subscribe	➤ Sign Up
➤ Subscribe	Tablets	100 mg	➤ Subscribe	➤ Sign Up

International Patents for VIAGRA

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Country	Document Number	Estimated Expiration
Australia	676571	➤ Sign Up
Hungary	227877	➤ Sign Up
Ecuador	SP941102	➤ Sign Up
Country	Document Number	Estimated Expiration

Supplementary Protection Certificates for VIAGRA

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Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
90005	Netherlands	➤ Sign Up	PRODUCT NAME: SILDENAFIL, DESGEWENST IN DE VORM VAN EEN FARMACEUTISCH AAN- VAARDBAAR ZOUT, IN HET BIJZONDER SILDENAFIL CITRAAT; NATL REGISTRATION NO/DATE: EU/1/98/077/001-012 19980914; FIRST REGISTRATION: CH 54642 19980622
C0007	Belgium	➤ Sign Up	PRODUCT NAME: SILDENAFIL, NATL REGISTRATION NO/DATE: EU/1/98/077/001 19980914; FIRST REGISTRATION: CH 54642 19980622
C/GB99/004	United Kingdom	➤ Sign Up	PRODUCT NAME: SILDENAFIL AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF, IN PARTICULAR THE CITRATE SALT; REGISTERED: CH 54642 19980622; UK EU/1/98/077/001 19980914; UK EU/1/98/077/002 19980914; UK EU/1/98/077/003 19980914; UK EU/1/98/077/004 19980914; UK EU/1/98/077/005 19980914; UK EU/1/98/077/006 19980914; UK EU/1/98/077/007 19980914; UK EU/1/98/077/008 19980914; UK EU/1/98/077/009 19980914; UK EU/1/98/077/010 19980914; UK EU/1/98/077/011 19980914; UK EU/1/98/077/012 19980914
Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description

Summary for VIAGRA

Pharmacology for VIAGRA

Medical Subject Heading (MeSH) Categories for VIAGRA

Synonyms for VIAGRA

Paragraph IV (Patent) Challenges for VIAGRA

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