| This has been one of the advantages for | | | | study. The anti-impotence drug not only |
| Viagra(R), in that it is capable of being | | | | speeds sperm up, researchers found, but it |
| taken as a tablet and is relatively | | | | also caused the vital reaction needed to |
| quick-acting. A convenient factor when | | | | penetrate an egg to occur prematurely. |
| perhaps one's partner won't wait forever! | | | | |
| | | | Viagra and nitrates work by dilating the |
| Viagra(R) dosages are usually 25mg to 100mg | | | | blood vessels, which, in turn, lowers blood |
| (50mg doses being the average), taken up to | | | | pressure. Taken together, they can cause |
| one hour before sexual intercourse. These | | | | blood pressure to plummet to dangerous |
| dosages have produced side effects such as | | | | levels. The problem is compounded by Viagra's |
| headache, flushing and dyspepsia. There have | | | | long-lasting effect. According to Charlotte |
| been some reports of disturbances, dizziness, | | | | Yeh, MD, chief of emergency medicine at New |
| and nasal congestion. Other rarer adverse | | | | England Medical Center in Boston, "They |
| effects reported include diarrhea, muscle | | | | [Viagra users] may not realize that Viagra |
| pain, skin rashes, and urinary or | | | | remains active in the body for 12 hours or |
| respiratory-tract infection. | | | | more." |
| | | | |
| "Viagra was introduced in 1998 and since then | | | | Viagra is the most popular pill in the U.S., |
| it has been prescribed to over 16 million | | | | according to its manufacturer, Pfizer, Inc. |
| men," says David Glenn, one of the team that | | | | Viagra has long been known to cause visual |
| conducted the test tube experiments at | | | | side effects and has now been linked to |
| Queen's University in Belfast, Northern | | | | NAION, a "stroke of the eye" that causes |
| Ireland. Taking Viagra could reduce men's | | | | permanent loss of vision. |
| fertility; suggest the results of a new | | | | |