You can take it in a small dose daily or in a larger dose as needed. Oral medicines for ED usually work well and cause few side effects. These include a heart attack, stroke or a serious heart rhythm disorder in the past six months. Since , the ED medication Viagra has been available over the counter at many pharmacies, under the brand name Viagra Connect — only in the licensed strength of 50mg. These include itraconazole Sporanox, Tolsura , ketoconazole Extina, Ketozole, others and ritonavir Norvir. Official NHS advice adds there does not seem to be any lasting harmful effects from taking sildenafil, even over the course of months and years. Most online pharmacies do not prescribe or refill controlled substances, like Adderall, Xanax, or oxycodone.Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in test1.ru is also used to treat pulmonary arterial hypertension, a serious heart and lung . Sildenafil (Viagra). This medicine works best when you take it on an empty stomach an hour before sex. The body takes longer to absorb it after a high-fat meal or . sildenafil citrate or viagra Savings, Coupons and Information. | SILDENAFIL (sil DEN a fil) treats erectile dysfunction (ED). It works by increasing blood flow to the penis, which .