Viagra, uas nws lub npe hu ua Sildenafil, yog ib qho tshuaj feem ntau siv los kho erectile kawg (ED) hauv cov txiv neej. Nws yog Ameslikas tsim los ntawm Pfizer thiab tau txais kev pom zoo los ntawm FDA hauv 1998. Viagra ua haujlwm los ntawm kev ua kom cov ntshav ntws mus rau qhov chaw mos, pab cov txiv neej ua tiav thiab tswj kev erection thaum muaj kev sib deev. Cov khoom xyaw nquag, Sildenafil citrate, yog nyob rau hauv chav kawm ntawm cov tshuaj hu ua phosphodiesterase type 5 (PDE5) inhibitors.
Cov txheej txheem ntawm kev ua haujlwm cuam tshuam nrog inhibition ntawm PDE5 enzyme, uas ua rau kom cov leeg nqaij du thiab nthuav cov hlab ntsha hauv cov nqaij mos. Cov txheej txheem no pab txhawb cov ntshav khiav, uas yog qhov tseem ceeb rau kev erection. Nws yog ib qho tseem ceeb kom nco ntsoov tias Viagra tsuas yog siv tau thaum muaj kev sib deev stimulation.
Viagra feem ntau yog noj hauv qhov ncauj, kwv yees li 30 mus rau 60 feeb ua ntej kev sib deev. Tus qauv pib koob tshuaj yog 50 mg, tab sis nws tuaj yeem hloov kho raws li kev ua tau zoo thiab kev zam, txij li 25 mg mus rau 100 mg. Cov teebmeem ntawm cov tshuaj tuaj yeem kav ntev txog plaub teev, txawm tias qhov no txawv ntawm cov tib neeg.
Feem ntau cov kev mob tshwm sim ntawm Viagra muaj xws li mob taub hau, yaug, plab zom mov, qhov ntswg congestion, thiab kiv taub hau. Cov kev mob tshwm sim hnyav dua tsis tshua muaj tab sis tuaj yeem suav nrog kev pom lossis hnov lus tsis zoo thiab priapism, lub sijhawm ntev thiab mob erection uas xav tau kev kho mob tam sim.
Nws yog ib qho tseem ceeb uas yuav tau siv Viagra raws li kev taw qhia ntawm tus kws kho mob, vim tias nws tuaj yeem cuam tshuam nrog qee cov tshuaj, tshwj xeeb yog nitrates siv rau lub plawv mob, uas tuaj yeem ua rau cov ntshav siab poob qis. Cov neeg muaj mob tshwj xeeb, xws li mob plawv lossis mob siab, yuav tsum tsis txhob siv Viagra.
Ntxiv nrog rau kev kho erectile kawg, Sildenafil kuj tau sau npe raws li lub npe Revatio rau kev kho mob pulmonary arterial hypertension, ib qho mob uas muaj ntshav siab hauv cov hlab ntsha ntawm lub ntsws. Qhov no qhia tau hais tias nws versatility nyob rau hauv kev txhim kho cov ntshav txaus nyob rau hauv ntau qhov chaw ntawm lub cev.
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