I-Viagra (i-sagraenafil citrate) kunye nezinye izidakamizwa ze-erectile disysction (ED) zikhankanywe ngethuba elithile njengeyona nto ibangela ukulahlekelwa kweentetho, nangona uxhumo lusephantsi kolwazi kwaye alukwazi ngokuqinisekileyo.
Ngeli xesha iViagra yavunywa, ngo-1998, i-US Food and Drug Administration (i-FDA) yaseU.S. ifumene ukuba abantu abahlanu bangama-25,000 basebenzise i-Viagra kwiimvavanyo zonyango eziphuhlise ukulahlekelwa kwindlebe .
Le nani elincinci, yingakho isilumkiso malunga nokulahlekelwa kweendlebe akuzange kuvelele kakhulu ngexesha lokuvunywa.
Nangona kunjalo, ekupheleni konyaka ka-2007 i-FDA yaqala ukuphawula ezinye iimeko zokulahlekelwa kwindlebe kubantu abasebenzisa iViagra kunye nezinye izidakamizwa ze-ED eziyingxenye ye-phosphodiesterase Uhlobo 5 (PDE5) kwiklasi ye-inhibitor. Amanye amayeza e-PDE5 aquka i-Levitra (vardenafil) ne-Cialis (tadalafil).
Ukukhangela inkqubo yayo yokuchasa-mcimbi, i-FDA ifumene amatyala angama-29 ekulahlekelwa kwintetho emva kweentsuku ezintathu iintsuku zokugqibela zegulane ze-PDE5 inhibitor. Uhlobo lokulahlekelwa kweendlebe ezibikwe ngokuqhelekileyo lwalukholisa ukulahlekelwa kwindlebe yokuphulaphulwa kunye nokulahlekelwa kwintetho okanye ukulahlekelwa ngokupheleleyo kweentetho. Ngamanye amaxesha i- tinnitus ne-dizziness zibandakanyeka.
Ezilishumi elinesihlanu kwezi-29 ezichasene neziganeko ezichasene nazo zidibene ne-Viagra ngokukodwa. Kwiimeko ezintlanu, ukulahlekelwa kwintetho ngokukhawuleza kwenzeka emva komthamo wokuqala weViagra. Abantu abayisithoba babenalo ukulahlekelwa kweentlanganiso kunye kunye nomntu omnye olahlekelwe yintetho.
Abantu abayisishiyagalombili kwabali-15 babeye "ukuqhubeka" ukulahlekelwa kwindlebe kunye nabantu abane babenokulahlekelwa kwexesha elifutshane.
Ezi ziko zichazwe zikwazi ukudibaniswa ngqo kwi-inhibitors ye-PDE5 ngenxa yokubonakala kwamanye amacandelo, njengokuba isiguli sesidanga kunye nokusetyenziswa kwamanye amayeza. Nangona kunjalo, i-FDA ibonakala ibandakanyeke ngokwaneleyo ukuba idinga utshintsho kwiileyibhile zokwenza izibhengezo ukuze zithathe ingqwalasela engakumbi kwi-loss loss hearing.
Ungayilanda le ngcaciso kwiwebhusayithi ye-FDA.
I-FDA ilumkisa ukuba xa uqala ukuva ukulahlekelwa kwindlebe ngelixa u-Viagra okanye isilwanyana esifanayo, kufuneka ukhawuleze ukuyithatha kwaye uqhagamshelane nogqirha wakho. Ngokufanayo, oogqirha abaqaphela ukuba izigulane zabo zijongene nokulahlekelwa kwindlebe ngelixa ezi zi yobungozi mazibacebise ukuba bayeke ukuthatha.
Ucwaningo lweeLebhu
Ingaba iyakuboniswa ukuba iViagra ibangele ukuba ilahleko yokuvalelwa kwabantu? Abanye abaphandi bazama ukufumanisa. Abaphandi baseMzantsi Korea bafunde iigundane zendoda ezazingamaveki ezisixhenxe. Kwiintsuku ezili-105 ezinye zegundane zanikwa amazinga aphezulu e-Viagra. Ezinye iigundane azizange zinikwe i-Viagra kwaye zenziwa njengeqela lolawulo lokuthelekisa. La mabini maqela abe neemvavanyo zokuvavanya ngaphambi kokufunda kunye kwakhona kwiintsuku ezintlanu, 10, 15, 25, 35, 105 ne-135 zesifundo.
Ukuva kwabo bekuvivinywe ngeendlela ezininzi, kubandakanywa iimpendulo zengqondo kunye ne-otoacoustic emissions. Impendulo yophiko lobuchopho yindlela yokujonga indlela ubuchopho buphendula ngayo kwisandi. Ukukhutshwa kwe-otoacoustic yi-echoes ebuthakathaka eyenziwa yindlebe emva kokuva isandi. Iziphumo zibonise ukuba amayeza aphezulu e-Viagra akhulisa ukutshintshwa kwendawo yokuvalelwa kweempendulo zengqondo.
Okokuthi, isandi saye safuna ukuphakamisa impendulo. Ukongeza, ukukhutshwa kwe-otoacoustic kwahluke phakathi kwamagundane e-high-dose kunye namagundane okulawula xa unyango lunikezelwa ixesha elide.
Abaphandi baphetha ngelithi i-high-dose kunye nexesha elide lonyango lingabangela ukulahlekelwa kwindlebe kwiimiceba. Ingaba neziphumo ezifanayo zingenzeka kubantu? Abaphandi bacacisa umzekelo wendoda eneminyaka engama-44 ubudala eyaba nelahleko lokuva emva kokuthatha i-Viagra kwi-50 milligrams ngosuku iintsuku ezingama-15.
Nangona kungenakuqinisekiswa ngokuqinisekileyo ukuba iViagra kunye namanye amayeza e-PDE5 abangela ukulahlekelwa kwindlebe kubantu, ubungqina bombutho uyaqhubeka nokungena.
Lo mbutho uxhaswa nezifundo zezilwanyana ezifana nalezi ngasentla. Kuze kube ngoku, ubungqina obukhoyo bubonisa ukuba iziganeko ziphantsi, kodwa izazinzulu ziyaqhubeka zifuna ukuphanda olunye uphando.
Imithombo:
U-Bin Na Hong, uThae Hoo Yi, uSay Yeou Kim kunye noTong Ho Kang, "I-High Dosage Sildenafil ikhupha ukuvalelwa kweMicebe", i-Biol. UFaro. Bull., Vol. 31, 1981-1984 (2008).
Izidakamizwa ze-Erectile kunye nokulahlekelwa kwintetho ngokukhawuleza. (ISAZISO! Izaziso ezibalulekileyo ze-FDA ze-Audiologists) I-Audiology namhlanje. Novemba-Disemba 2007 v19 i6 p53 (1).
Ulwazi lwetazisi yeViagra. Kufumaneka nge http://www.accessdata.fda.gov/scripts/cder/drugsatfda/index.cfm
Ulwazi lwezokhuseleko lwezilwanyana lwe-postmarket kwizigulane kunye nababoneleli. http://www.fda.gov/Drugs/DrugSafety/PostmarketDrugSafetyInformationforPatientsandProviders/ucm124841.htm