What is ED? How does Viagra, Levitra and Cialis work?

ED reffers to erectile dysfunction, a common conditions among men in all age ranges, with an incidence of more than 30 million male patients in the US alone. A patient is diagnosed with ED when he is occasionally or repeatedly, consistently or inconsistently unable to achieve and maintain an erection firm enough for sexual intercourse. This happens as a result of various physical and/or psychological conditions which diminish or lessen blood flow into the penis. This is where oral erectile disfunction drugs steps in: increaseing blood flow to the penis at sexual arousal, leading, thus, to an erection.

Viagra was the first oral ED drug granted by the Food and Drug Administration to hit the shelves in 1998. Viagra was the expression of Pfizer's medical breakthroughs and enjoyed great popularity all over the world. Viagra is branded by Pfizer Pharmaceuticals. Viagra is avalable in 50 and 100 miligram pills.

Levitra is a Food and Drugs Administration approved oral prescription medication for the treatment of erectile dysfunction (ED) in men. Levitra is the Bayer and GlaxoSmithKline alliance answer to Viagra. Levitra manufactured by GlaxoSmithKline. Levitra is avalable in 10 and 20 miligram pills.

Cialis is different from all the other oral ED drugs in that it stresses no limits to what you can experience. Cialis gives 36 hours of romance and pleasure for you to manage the way you want to. Cialis lasts long and works fast, in less than half an hour. You can find 10 and 20 miligram pills of Cialis, a product branded by Eli Lilly.

Discover the Cialis Diference
Cialis is a PDE5 Inhibitor working the same way as all other oral erectile dysfunction drugs only more effective. Cialis helps men achieve an erection by increasing blood flow to the penis in approximately 30 minutes after taking it, which is almost twice as fast as is competitors. But the most spectacular thing about it is that its active ingredient (Tadalafil) stays in body for nearly 36 hours. For the first time, men with erectile dysfunction can have both firm erections and sexual spontaneity.Cialis has a series of contraindications meant to safeguard your health. Cialis is contraindicated in combination with nitrates, medication used in treating chest angina, alpha-blockers, used in treating prostate problems or high blood pressure.Cialis does not have food restrictions, but the manufacturer contraindicates excessive alcohol consumption, as it may result into dizziness or a sudden drop in the blood pressure. Cialis works with food and alcohol.Patients already taking ketoconazole or nitonoavir should not overpass 10 mg dose of Cialis once every 72 hours. An even lower dose of Cialis (5 mg once a day) is recommended to those patients suffering from decreased kidney function. Restrictions in taking Cialis are also met by men with liver impairment or with an uncertain heart condition, by patients who have recently suffered a heart attack or those suffering from eye disorders.Consequently, the safest way to take Cialis is after completing a thorough medical examination which will not only reveal the patient's tolerance to the treatment but also determine the adequate dosage.Cialis may also determine adverse reactions although not all patients may experience them. Most reported side-effects were headaches, indigestion, nasal congestion, muscle and back pain, flushing. Rarely reported were cases of vision disturbances, dizziness or priapism - a painful erection prolonged for more than 4 hours, which require urgent medical help. Cialis doesn't protect patients from any sexually transmitted disease or from HIV. Cialis works on men sexually aroused only.