Generic Viagra (sildenafil) is an alternative to the branded Viagra drug that can be used for treating erectile dysfunction (ED). It’s Author: James Roland.A newer form of the medicine that dissolves on the tongue might work faster than the pill that you swallow. Use the oral syringe provided with your medication to measure and take your dose. This increased blood flow can cause an erection. Rarely reported side effects include: an erection that will not go away priapism. If you have an erection that lasts more than 4 hours, get medical help right away.Side Effects. Dizziness, headache, flushing, or stomach upset may occur. Vision changes such as increased sensitivity to light, blurred vision, or trouble telling blue and green colors apart may. The average length of time Viagra lasts. On average, Viagra lasts between 2 and 3 hours before its effects start to diminish. Viagra can last up to 5 hours or longer depending on your dosage, your. · Currently, there are no over the counter alternatives to Viagra available. Viagra (sildenafil) is a prescription medication, meaning it’s not available over the counter from your.These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. This medication is taken with or without food an hour before sex. In some patients, the use of VIAGRA with alpha-blockers can lead to a drop in blood pressure or to fainting medicines called HIV protease inhibitors, such as ritonavir Norvir , indinavir sulfate Crixivan , saquinavir Fortovase or Invirase , or atazanavir sulfate Reyataz some types of oral antifungal medicines, such as ketoconazole Nizoral and itraconazole Sporanox some types of antibiotics, such as clarithromycin Biaxin , telithromycin Ketek , or erythromycin other medicines that treat high blood pressure other medicines or treatments for ED VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO. Side effects Side effects of oral ED medicines are often mild. Stop taking VIAGRA and call your healthcare provider right away if you have any sudden vision loss sudden hearing decrease or hearing loss. Your doctor or other health care professional can recommend one for you based on these factors, other health conditions you have and any other medicines you take. As with sildenafil, a high-fat meal or alcohol keep the body from absorbing it as quickly.
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