Viagra

my doctor gave me tablets of 50 mg ,he told me to use half of the tablet that means 25 mg ,first time when i took it after an hour it helped , i did it once AND thats it ?????!!!!! is that normal ???????? couple of days ago i tryed again , but it did not help i am not getting even 1 full hour, AND i did not have sex even once that night what to do to take 50 mg another important question, can i use viagra AND drink alcohol ??????????

מה שהורס אותך זוהי שתיית האלככוהול יחד עם הויאגרה - אל תעשה זאת אם לא תעשה - תוכל לקחת אפילו רבע כדור ולא חצי