| http://www.w3.org/ns/prov#value | - While these medications have been proven to help at least 50% of men who take them to cure impotence, they come with a laundry list of side effects.The most common adverse effects include flushing, headache, and nausea; however, more serious side effects such as fainting, an unsafe drop in blood pressure, and priapism (a painful erection that lasts for an extended period of time, with the potentia
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