Rarely reported side effects include: an erection that will not go away priapism. It added further: “As a matter of policy and sound statutory interpretation, patentees cannot be allowed to ‘game’ the system in this way. The information provided is for educational purposes only and is not intended to replace discussions with a healthcare provider. Viagra is also informally known as “vitamin V”, “the blue pill”, or “blue diamond”, as well as various other nicknames. If you have an erection that lasts more than 4 hours, get medical help right away. If you experience chest pain, dizziness, or nausea during sex, seek immediate medical help. This site is intended only for U.Sildenafil, sold under the brand name Viagra, among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. [4] [8] It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud’s phenomenon. [9] It is unclear if it is effective for treating sexual dysfunction in females. [8]. Viagra is a brand-name drug manufactured by Pfizer. Sildenafil citrate is the generic version. The average Viagra cost is quite expensive at about $ for 1, MG Tablet of Viagra. However, you can use a Viagra coupon below to pay a reduced price of $ for 30, mg Tablet of generic Viagra at participating pharmacies near you. 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.