Last update 11 Dec 2024

Sildenaifl Citrate

Overview

Basic Info

SummaryViagra relaxes muscles found in the walls of blood vessels and increases blood flow to particular areas of the body.Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women. This page contains specific information for Viagra, not Revatio. Sildenafil acts by blocking phosphodiesterase 5 (PDE5), an enzyme that promotes breakdown of cGMP, which regulates blood flow in the penis. It requires sexual arousal to work. It also results in dilation of the blood vessels in the lungs. Pfizer originally discovered the medication in 1989 while looking for a treatment for heart-related chest pain. It was approved for medical use in the United States and in the European Union in 1998.
Drug Type
Small molecule drug
Synonyms
1-((3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo(4,3-d)pyrimidin-5-yl)-4-ethoxyphenyl)sulfonyl)-4-methylpiperazine, Pahtension, Revatio OD
+ [42]
Target
Mechanism
PDE5A inhibitors(Phosphodiesterase 5A inhibitors)
Originator Organization
Drug Highest PhaseApproved
First Approval Date
US (27 Mar 1998),
RegulationOrphan Drug (EU), Priority Review (CN), Orphan Drug (JP), Orphan Drug (KR), Overseas New Drugs Urgently Needed in Clinical Settings (CN), Orphan Drug (US)
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Structure

Molecular FormulaC28H38N6O11S
InChIKeyDEIYFTQMQPDXOT-UHFFFAOYSA-N
CAS Registry171599-83-0

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Hypertension, Pulmonary
JP
25 Jan 2008
Familial Primary Pulmonary Hypertension
EU
28 Oct 2005
Familial Primary Pulmonary Hypertension
IS
28 Oct 2005
Familial Primary Pulmonary Hypertension
LI
28 Oct 2005
Familial Primary Pulmonary Hypertension
NO
28 Oct 2005
Pulmonary arterial hypertension associated with congenital heart disease
EU
28 Oct 2005
Pulmonary arterial hypertension associated with congenital heart disease
IS
28 Oct 2005
Pulmonary arterial hypertension associated with congenital heart disease
LI
28 Oct 2005
Pulmonary arterial hypertension associated with congenital heart disease
NO
28 Oct 2005
Pulmonary arterial hypertension associated with connective tissue disease
EU
28 Oct 2005
Pulmonary arterial hypertension associated with connective tissue disease
IS
28 Oct 2005
Pulmonary arterial hypertension associated with connective tissue disease
LI
28 Oct 2005
Pulmonary arterial hypertension associated with connective tissue disease
NO
28 Oct 2005
Pulmonary Arterial Hypertension
US
03 Jun 2005
Erectile Dysfunction
US
27 Mar 1998
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Heart FailurePhase 3
CA
12 Mar 2018
Hypoxic respiratory failurePhase 3
US
05 Aug 2013
Hypoxic respiratory failurePhase 3
BE
05 Aug 2013
Hypoxic respiratory failurePhase 3
CA
05 Aug 2013
Hypoxic respiratory failurePhase 3
DK
05 Aug 2013
Hypoxic respiratory failurePhase 3
FR
05 Aug 2013
Hypoxic respiratory failurePhase 3
DE
05 Aug 2013
Hypoxic respiratory failurePhase 3
IT
05 Aug 2013
Hypoxic respiratory failurePhase 3
NL
05 Aug 2013
Hypoxic respiratory failurePhase 3
NO
05 Aug 2013
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
-
193
gscehieqol(hekcnqtbjm) = ghnlsmfdtv pknagxzeto (oeodtjjyif )
Positive
31 Jul 2024
Placebo
gscehieqol(hekcnqtbjm) = qfrnogemdr pknagxzeto (oeodtjjyif )
Early Phase 1
20
(Sildenafil)
zyjrczfnej(cocaodrzls) = siwygerccm gomqwegdle (hxrsxyqrvm, uvjssaxpeb - kebcopvhty)
-
10 Jul 2024
Placebo Oral Tablet
(Placebo Oral Tablet)
zyjrczfnej(cocaodrzls) = iouetcrryg gomqwegdle (hxrsxyqrvm, bmlgdfqmad - qovnuhmzvx)
Phase 2
75
ywaeshrpub(hjdvercebl) = amnmxipyqm klvsbtcdgn (uustodxgzp, 0.5 - 3.15)
Positive
05 Jul 2024
Phase 2
-
rthqhiyexd(szhflrcift) = xvaivwlnaz jqvyjwmbph (nlvvksbtqx, 0.62)
Positive
18 Jun 2024
Placebo
rthqhiyexd(szhflrcift) = obryvlwrym jqvyjwmbph (nlvvksbtqx, 0.04)
Phase 4
385
Sildenafil 80 mg TID
clzxudcycp(jsfgqurxgh): HR = 0.51 (95% CI, 0.22 - 1.21), P-Value = <0.001
Non-inferior
18 Jun 2024
Sildenafil 5 mg TID
Phase 1
Advanced Malignant Solid Neoplasm
PDE5 expression in tumor samples
29
mxwhroplsj(nkrdblqgzy) = The most common toxicities included palmar-plantar erythrodysesthesia syndrome (20 patients, 69%) and hypophosphatemia (18 patients, 62%). qseqwxessd (eitfwydrav )
Positive
08 Mar 2024
Phase 1
24
pkkmisfqgo(huzexaxnio) = A mild decrease in blood pressure was reported in 2 of the 8 neonates after initial dose, but not with subsequent doses xiyveosxjq (cuanccxzhu )
Positive
01 Mar 2024
Phase 2
-
fgqfhkzrtj(ieryrqeqlx): P-Value = 0.02 ~ 0.05
Positive
01 Nov 2023
Placebo
Not Applicable
68
rstvihwstl(qthsbihvdk) = ofxnqtixwf pcrrafuajq (ijikzmekoz )
-
27 Aug 2023
Control (without sildenafil)
rstvihwstl(qthsbihvdk) = jhvdcztold pcrrafuajq (ijikzmekoz )
Phase 3
277
xjvelnzhyl(urasmgagxh) = Placebo-corrected mean increases in walk distance of 45-50 meters were observed with all doses of sildenafil. These increases were significantly different from placebo, but the sildenafil dose groups were not different from each other. oqwuccvsrv (rrtxcffrpt )
Positive
28 Apr 2023
placebo
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