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When Viagra was introduced in 1999, the drug's manufacturers warned of a number of visual side effects, including possible nerve damage to migliore farmacia online per viagra eyes. But researchers at the University of California, Irvine found that nerve damage in healthy people is extremely unlikely valmorca viagra vs cialis even when Viagra is taken in high doses. Since Viagra lowers blood pressure overall, there was persistent suspicion that the drug might reduce blood flow to the eyes, which can cause nerve damage. But Dr Tim McCulley, assistant professor of ophthalmology at Irvine, said there was no evidence that taking the drug had any significant impact on reducing blood flow in the eyes. Dr McCulley said: "Viagra can change blood vessel structure as well as general blood pressure, so we needed to answer the question whether the drug could change blood vessels in the eye. The researchers carried out tests on 13 patients. They found that high doses of Viagra by and large preserved the thickness of the eye's choroids layer, which supplies the eyeball with blood. However, the team did find some small variations in thickness, which indicated that some people with underlying vascular diseases may indeed have changes in vision.

They mind a lot -- and so do their partners. But while the mind often plays a big role in creating ejaculation problems, it's also key in overcoming them. Here are some tips on what to viagra imagen. Common Ejaculation Problems. When it comes to ejaculation, there are basically three different things that can go wrong. Premature ejaculation is by far the biggest complaint meteo am viagrande dentist men have about their sexual performance. After studying data gathered by the National Health and Social Life Survey, sociologist Edward Laumann, PhD, estimated that a third of American men complain that they ejaculate too quickly. They want to last longer during intercourse to prolong the pleasure, both for themselves and their partners.

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Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Viagra only for the indication prescribed. Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect.

Even though you've quit, it's possibile that ecstasy's lingering side effects are still affecting you in the bedroom. As concerning as not ejaculating might be, know that if your trouble with ejaculating is due to ecstasy use, the effect will likely wear off eventually. Ecstasy (also known as MDMA and many other names) is a powerful drug that acts as a stimulant and hallucinogen. Its chemical mechanism works on serotonin levels in the brain, increasing pleasure and improving mood, thus affecting heart rate and sleep.]