Sildenafil blockiert die Phosphodiesterase-5 und steigert dadurch die intrazellulären cGMP-Konzentrationen. Die Wirkung setzt innerhalb von 30 bis 60 Minuten ein. Seine Halbwertszeit von vier Stunden macht den Wirkstoff zu einem Präparat mit kurzer Wirkdauer. Der Abbau erfolgt über CYP3A4 und CYP2C9, und die Elimination ist überwiegend biliär. Nebenwirkungen wie Kopfschmerzen und Hautrötungen sind vasodilatationsbedingt. Der Begriff viagra kaufen taucht häufig im Zusammenhang mit dem pharmakologischen Standard dieser Substanzklasse auf.

"N" - Pharmacy Online Catalog:

nationaldrugstrategy.gov.au: National Drug Strategy - National Drug Strategy

The National Drug Strategy (NDS) and its forerunner, the National Campaign Against Drug Abuse (NCADA), have been operating since 1985. Both NCADA and NDS were created with strong bipartisan political support and involve a cooperative venture between the Commonwealth and state/territory governments as well as the non-government sector.

neomed.edu: Northeast Ohio Medical University — NEOMED

Northeast Ohio Medical University (NEOMED) is a community-based, public institution that provides interdisciplinary training of doctors, pharmacists, researchers and other health professionals, offering both a doctor of medicine and a doctor of pharmacy degree. The NEOMED educational consortium includes the Rootstown, Ohio, campus, teaching hospitals, associated hospitals and health departments.

nymc.edu: New York Medical College

New York Medical College, one of the nation's largest private health sciences universities, is located in Westchester County, New York, in the picturesque Hudson Valley region of New York State. The university's Valhalla campus is just 30 minutes north of New York City.