2024-11-29T15:08:09+0800
5 things to know about Viagra Pfizer Inc. release the drug in 1998 to help men with erectile dysfunction. It works by increasing the blood flow to the penis. Side effects may include flushing, upset stomach, and muscle aches. More than 62 million men across the globe have used the blue pill. Pfizer will offer a generic version for the first time in Dec. 2017.
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