Rarely reported side effects include: an erection that will not go away priapism. However, some states require a live video consultation. An erection results from an increase in blood flow to the penis. Shipping: Discreet, fast shipping is a must. These PDE5 inhibitors may cause headache, flushing, drop in blood pressure, or other adverse effects.from $ for 10 tablets 25 mg sildenafil oral tablet from $ for 30 tablets 50 mg sildenafil oral tablet from $ for 15 tablets mg sildenafil oral tablet from $ for . How much does generic Viagra cost? Generic Viagra usually costs anywhere from about $2–$ To get a GoodRx coupon for generic Viagra, just search for your prescription on or in the GoodRx mobile app. Then, click on “set your location” to find .