What is the Best Erectile Dysfunction Drug

Treatments for erectile dysfunction do not damage eyesight, according to new research from pharmaceuticals firm Eli Lilly.

Studies conducted by the company focused on sildenafil and tadalafil, looking into their use over a six-month period to determine whether vision might be affected.

The researchers explain that fears arose due to the action of erectile dysfunction therapies on the phodiesterase type 5, or PDE5, compound.

As well as being connected with blood vessels in the penis, PDE5 is known to act in the retina, leading to concerns that drugs such as Viagra might damage eyesight.

In the report, the authors concede that side-effects of treatment with Viagra, Cialis and Levitra include photosensitivity and blue-tinged vision.

But, even after six months of daily use, no lasting or long-term effects are witnessed among men who take the drugs.

Participants were tested against a placebo group for effects such as pressure within the eyeball, changes in the eye's anatomy and visual acuity.

No significant differences are reported on any of the tested criteria after long-term regular use of erectile dysfunction treatments.

Eli Lilly claims that around one in ten men suffer from erectile dysfunction, typically due to a physical cause or a combination of physical effects and psychological exacerbating factors.