Patients with liver problems or severe kidney problems should start treatment with the 25 mg dose. Others Others Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. The medicine can only be obtained with a prescription. An inherited eye disease that affects the retina. By blocking the breakdown of cGMP, Viagra restores erectile function. Recent heart or blood vessel problems.Drugs including Viagra and Cialis lead to an average improvement of 4 to 8 points on the scale used by researchers and clinicians. The team behind the new study suggests that . Generic Viagra (sildenafil) is an alternative to the branded Viagra drug that can be used for treating erectile dysfunction (ED). It’s now sold by many manufacturers, including online. 66 reviews 37 helpful votes 1. Re: Viagra 5 years ago Save It seems to be OK if in small quantities. .