Generic Levitra (Vardenafil)

Short Answer: No, it is not safe to take Levitra and Viagra together. You should only take one or the other. They are similar drugs, so it makes sense to try both, on different days, and see which works best for you.

Long Answer: More is not better with these drugs. In fact, you should try to take the smallest dose that is effective for you. Lower doses generally result in fewer side effects. Taking too much can be uncomfortable and is potentially dangerous.

Both Levitra and Viagra should be taken at most once a day. Never take more than one dose a day of either drug.

Like a column collapsing under the burden of a heavy roof, erectile dysfunction is a classical mechanical engineering problem, says a US urologist. Using mathematical models of penis geometry and hydrostatic pressure, doctors can predict when penises will fail - and in which vagina - he says.

The most widely investigated parameter of penile rigidity is intracavernosal pressure (ICP) - the fluid pressure achieved by blood build up in the two expandable “caverns” of the penis. For a healthy man, the erect ICP is between 60 and 90 millimetres of mercury (mmHg), but can drop to just 30 mmHg, in men with erectile dysfunction (ED).

Anti-impotence drugs, such as Viagra, Cialis and Levitra work by relaxing arterial muscles and allowing more blood, and hence more pressure, to build up in the penis.

But Daniel Udelson, a research urologist and professor of aerospace engineering at Boston University, thought that penis geometry - specifically the ratio of width to length - ought to play a significant role in the robustness of an erection against the force of sexual intercourse.

So Udelson developed a model that would predict the buckling force, based on penis length, circumference and the ease of expandability over a range of ICPs - it is a direct adaptation of 200-year-old column buckling research by Swiss mathematician Leonard Euler. Udelson tested the model against 57 men with erectile dysfunction.

Each was measured by slowly injecting their penises with saline solution until erect. Udelson then applied a force to the tip of the penis until it started to bend, the first sign of buckling. The model correctly predicted the buckling forces for 80% of patients - forces ranged from about 2 kilograms to just 0.3 kg given a pressure of 50 mmHg. But the buckling force during intercourse doesn’t just rely a man’s blood flow and penis shape, it also depends on his partner’s vagina. Previous studies have found that the force required enter a vagina, which depends on a vaginal diameter and lubrication, ranges from 1.5 to 2.5 kg. So, “an individual male may exhibit ED with one partner but not with another,” says Udelson

It has been found that Sexual performance in men seems to decline as their prostate enlargement. Doctors also notice that men with milder prostate problems often have less erectile dysfunction (ED) than do those with moderate or severely enlarged prostates and urinary symptoms.

Probably the two diseases erectile dysfunction and the lower urinary tract symptoms associated with benign prostatic hyperplasia are inter linked to each other

These both problems tend to enhance with age. About 31% of men aged 50 to 59 have an enlarged; 44% of those 70 and older have an enlarged prostate, according to the National Institutes of Health. As the gland enlarges, it constricts the urine-carrying tube called the urethra, making it difficult to
empty the bladder.

Common symptoms of BPH consist of weak urine stream, leaking or dribbling, feeling that the bladder hasn’t emptied completely after voiding, and more
frequent urination.

Medications are approved to lighten the symptoms. Some of medications work by relaxing the muscles at the neck of the bladder and prostate; others slow down a hormone that can lead to the expansion of the gland

According to a study, 223 matured men between 45 to 64 who had urinary symptoms due to an bloated prostate were assigned either to a group given 10 milligrams of Levitra twice daily for eight weeks or a panacea for the same time period.

As compared with placebo, Erectile Dysfunction drugs considerably improved the men’s quality-of- life scores and their rumor of urinary impediment and irritation.

Levitra is a hopeful new drug for men with lower urinary zone symptoms, but we need long-term data on how it might affect the progression of the disease,” he says.