Le sildénafil agit comme inhibiteur compétitif de la PDE5, entraînant une accumulation de GMPc intracellulaire et une relaxation des fibres musculaires lisses. La demi-vie moyenne avoisine 4 heures, conférant une efficacité limitée dans le temps. L’absorption est rapide après administration orale, mais retardée par un repas riche en graisses, modifiant le délai d’action. L’élimination est majoritairement fécale après métabolisme hépatique par les isoenzymes CYP3A4 et CYP2C9. Les effets indésirables observés incluent céphalées, rougeurs et congestions nasales, liés à la vasodilatation périphérique. Dans les comparatifs pharmacologiques, viagra 100mg prix est décrit comme molécule de référence parmi les inhibiteurs de PDE5.
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Grupo de Vías Respiratorias de la AEPap (GVR-AEPap). CAP La Mina, San Adrià del Besós. Rev Pediatr Aten Primaria. 2005;7 Supl 2:S79-95 María José Torregrosa Bertet, [email protected] Resumen La vía inhalatoria es la de elección en el tratamiento del asma en la edad pediátrica. Esta vía aporta una serie de ventajas con respecto a la oral o parenteral, entre las que
Dental endosseous implants in the medically compromised patient. Eastman Dental Institute, University College London, London, UK. [email protected] Abstract The literature contains numerous observations on the significance of systemic disorders as contraindications to dental endosseous implant treatment, but the justification for these statements is often apparently allegorical