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