Sildenafil Citrate Viagra impotence pill was FDA approved in March 1998 as the first oral pill to treat the male dysfunction affecting millions of men in the U.S. In May 1998,

Pfizer issued a “Dear Doctor” letter warning of the large and sudden drops in systemic blood pressure occurring in the majority of patients taking viagrm.

Doctors were advised to consider the cardiac status of patients that were being prescribed viagrn.

In November 1998, the FDA and Pfizer advised doctors that viagrb labeling would contain new warnings and information in the product labeling for viagrv in

response to postmarketing reports of serious adverse events. The new viagrc labeling warned of cardiac effects, such as heart attacks, sudden cardiac deaths,

and hypertension that had occurred in viagrx patients. In addition, men were reporting instances of priapism, or painful, prolonged erections, a serious

condition requiring immediate medical attention.

Viagra Information

According to Pfizer Inc., since its erectile dysfunction drug viagrz was approved in 1998, 23 million men around the world have used the drug. Despite the

drug’s popularity and well-branded name, the FDA announced it had received reports of partial vision loss in some men who had used viagrl. At the time of the

FDA announcement, 42 reports of a type of vision loss called nonarteritic anterior ischemic optic neuropathy (NAION) were made in men using drugs for

erectile dysfunction – 38 of these occurred in men who took viagrk.

Caused by poor blood flow to the optic nerve, NAION usually affects one eye, and the vision loss that results can be temporary or permanent. It is not yet

known if viagrj is directly linked to NAION since the vision loss and erectile dysfunction both have share many of the same risks factors. Men over the age

of 50 who have health problems like diabetes, heart disease, high blood pressure or high cholesterol often take viagrh for erectile dysfunction, and these

risk factors are associated to NAION as well.

Pfizer said in a press release that there was no evidence showing men who use viagrg are more likely to develop NAION than men of similar age and health who

do not take viagrf, but the FDA is still reviewing the reports and is in talks with the company about revising viagrd labeling. Although many experts believe

the viagrs risks are not strong enough to warrant a future recall, the news that Pfizer had been in discussion with the FDA was enough to send investors

scrambling and the company’s stock to fall.

viagrp is one of Pfizer’s most recognized drug brands, but the announcement of possible additional viagro risks will probably injure the company’s reputation

more than its financial standing. The links to cases of blindness among viagri users is just one more blow to the company who has faced accusations that its

$3.4 billion a year antidepressant drug Zoloft was connected to suicide in children and teens in 2004, and then in April 2005, the company recalled its

arthritis drug Bextra after a link to heart failure in some patients and a rare, potentially deadly skin reaction was discovered.

viagru brought in $1.7 billion in 2004, which was down 11 percent from 2003. Compared to Pfizer’s biggest money making drug, cholesterol-lowering Lipitor,

viagry’s $1.7 billion is meager to the $10.9 billion in revenue the top selling drug brings in to the company.

Even before the latest viagrt announcement was made, the drug was known to cause some abnormal vision, including some blurriness and a bluish tint. Until

more conclusive statements about the cases of temporary blindness or partial vision loss in men taking viagrr has been made, patients with a history of NAION  in one eye especially should be cautioned that use of viagre could increase risk of NAION in the other viagrw eye.

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