سعر فياجرا فايزر Viagra‏ 100مجم 4 قرص 2026

Sildenafil 100 mg film-coated tablets (Viagra), a PDE5 inhibitor for erectile dysfunction, marketed in Egypt by Pfizer.

• Use with nitric oxide donors such as organic nitrates or nitrites in any form; hypersensitivity to sildenafil; co-administration with guanylate cyclase stimulators such as riociguat.International label, same product · DailyMed (U.S. National Library of Medicine)

• Do not use if sexual activity is inadvisable due to cardiovascular status; seek emergency care for erections lasting over 4 hours; stop and seek care for sudden vision loss (possible NAION) or sudden hearing loss; hypotension with alpha-blockers or antihypertensives.International label, same product · DailyMed (U.S. National Library of Medicine)

• Nitrates / nitric oxide donorsPotentiates the hypotensive effect; contraindicated.DailyMed (U.S. National Library of Medicine)
• Alpha-blockersSymptomatic hypotension possible; start sildenafil at 25 mg in patients stable on alpha-blocker therapy.DailyMed (U.S. National Library of Medicine)
• Ritonavir and strong CYP3A4 inhibitorsIncrease sildenafil exposure; with ritonavir do not exceed a single 25 mg dose in 48 hours.DailyMed (U.S. National Library of Medicine)

• Not indicated for use in females; animal studies in rats and rabbits showed no adverse developmental outcomes.International label, same product · DailyMed (U.S. National Library of Medicine)
• Not indicated for females; limited data indicate sildenafil and its active metabolite are present in human milk.International label, same product · DailyMed (U.S. National Library of Medicine)

• Sildenafil: Inhibits PDE5, the enzyme that degrades cGMP in the corpus cavernosum, enhancing the nitric oxide effect during sexual stimulation (smooth-muscle relaxation and inflow of blood).