Sildenafil citrate

Sildenafil citrate Structure
Sildenafil citrate structure
Common Name Sildenafil citrate
CAS Number 171599-83-0 Molecular Weight 666.700
Density 1.447g/cm3 Boiling Point 672.4ºC at 760 mmHg
Molecular Formula C28H38N6O11S Melting Point 187-189ºC
MSDS Chinese USA Flash Point 360.5ºC
Symbol GHS07
GHS07
Signal Word Warning

Sensitive and precise HPLC method with back-extraction clean-up step for the determination of sildenafil in rat plasma and its application to a pharmacokinetic study.

Biomed. Chromatogr. 29 , 1559-66, (2015)

A sensitive HPLC method was developed and validated for the determination of sildenafil concentrations in rat plasma (200 μL) using a liquid-liquid extraction procedure and paroxetine as an internal standard. In order to eliminate interferences and improve th...

A rapid method for determination of 22 selected drugs in human urine by UHPLC/MS/MS for clinical application.

J. AOAC Int. 97(6) , 1526-37, (2015)

A rapid and sensitive ultra-HPLC/MSIMS (UHPLC/MSIMS) assay method for the simultaneous determination in human urine of 22 drugs belonging to different pharmaceutical groups was developed. The drugs were extracted from urine samples and then separated on a Zor...

Different compartmentation of responses to brain natriuretic peptide and C-type natriuretic peptide in failing rat ventricle.

J. Pharmacol. Exp. Ther. 350(3) , 681-90, (2014)

We previously found a negative inotropic (NIR) and positive lusitropic response (LR) to C-type natriuretic peptide (CNP) in the failing heart ventricle. In this study, we investigated and compared the functional responses to the natriuretic peptides (NPs), br...

Reduced vascular responses to soluble guanylyl cyclase but increased sensitivity to sildenafil in female rats with type 2 diabetes.

Am. J. Physiol. Heart Circ. Physiol. 309 , H297-304, (2015)

Impaired nitric oxide (NO), soluble guanylyl cyclase (sGC), and cyclic guanosine monophosphate (cGMP) signaling (NO-sGC-cGMP) has been implicated in the pathogenesis of diabetic vascular dysfunction. Efforts to directly target this signaling have led to the d...

Qualitative and quantitative analysis of PDE-5 inhibitors in counterfeit medicines and dietary supplements by HPLC-UV using sildenafil as a sole reference.

J. Pharm. Biomed. Anal. 98 , 327-33, (2014)

Due to their popularity, medicinal products containing the phophodiesterase type 5 enzyme (PDE-5) inhibitors sildenafil, vardenafil and tadalafil are often subject to counterfeiting. In addition, illicit herbal dietary supplements adulterated with these subst...

Simultaneous quantification of sildenafil and N-desmethyl sildenafil in human plasma by UFLC coupled with ESI-MS/MS and pharmacokinetic and bioequivalence studies in Malay population.

Biomed. Chromatogr. 29 , 953-60, (2015)

A simple, rapid, specific and reliable UFLC coupled with ESI-MSMS assay method to simultaneously quantify sildenafil and N-desmethyl sildenafil, with loperamide as internal standard, was developed. Chromatographic separation was performed on a Thermo Scientif...

Effects of Nigella sativa, Lepidium sativum and Trigonella foenum-graecum on sildenafil disposition in beagle dogs.

Eur. J. Drug Metab. Pharmacokinet. 40 , 219-24, (2015)

The present study was conducted to investigate the effects of some commonly used herbs namely Nigella sativa, Lepidium sativum and Trigonella foenum-graecum on the pharmacokinetics of sildenafil in beagle dogs. The study design involved four treatments in a n...

Determination of phosphodiesterase-5 inhibitors and analogs using high-performance liquid chromatography with ultraviolet detection.

J. Chromatogr. Sci. 53(1) , 38-46, (2014)

A considerable number of erectile dysfunction products, and dietary supplements suspected of containing phosphodiesterase-5 (PDE-5) inhibitors, have been analyzed by the US Food and Drug Administration. Often these samples are found to contain the approved ac...

Characterization of lung-delivered in-situ forming controlled release formulations.

J. Pharm. Pharmacol. 67 , 1349-54, (2015)

This study investigated the controlled drug release potential of formulations revealing temperature-induced sol-gel transition following administration to the respiratory tract.Diverse sildenafil-containing aqueous poloxamer 407 preparations were evaluated fo...

Endothelial TLR4 activation impairs intestinal microcirculatory perfusion in necrotizing enterocolitis via eNOS-NO-nitrite signaling.

Proc. Natl. Acad. Sci. U. S. A. 110(23) , 9451-6, (2013)

Necrotizing enterocolitis (NEC) is a devastating disease of premature infants characterized by severe intestinal necrosis and for which breast milk represents the most effective protective strategy. Previous studies have revealed a critical role for the lipop...