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Over the last years, on the global market of medicines there have arose a big number of various products for men to incite their erotic power. They comprise drugs of plant origin - herbal medicines and food additives or bioactive additives, homeopathic remedies etc. Chemically synthesized drugs, such as Viagra professional, Cialis professional, Levitra and others are also applied for such purpose.
Due to the number and diversity of medicines like Viagra, Cialis or Levitra, the doctor has a chance to choose the most resulting cure of erectile dysfunction on the basis of the occasions that produced it. So all these medicines has an absolute right to exist.
Here is a short survey of a great number of drug preparations for curing impotence.
Viagra
The nonproprietary world name of the drug known as Viagra is Sildenafil. It is the first product of phosphodiesterase type 5 inhibitors, a new group of medicaments.
The drug preparation expands the veins of a penis if there's enough erotic arousal. As a consequence the blood flow in a phallus is intensified that provokes usual erection.
Viagra is intended to treat erectile dysfunction in men which is as well known as impotence. There cannot be any sexual intercourse without usual erection but with erectile dysfunction erection doesn't happen. Viagra has an effect only in reply to sexual arousal and doesn't affect the reproductive function.
Your doctor should decide what Viagra dosage is ideal for you. The usual dose is 50 mg but because of its efficacy and medicament tolerance may be either enlarged to 100 mg or reduced to 25 mg.
Do not take a pill with a larger dose than was recommended by your physician. You should never take more than 1 pill of Viagra a day. In case of taking more pills that were recommended you should straightway contact your physician.
Cialis
At the moment, besides Viagra (Sildenafil), Cialis (Tadalafil) has found extensive application for the treatment of erectile dysfunction. It is the co-developing of the pharmaceutical enterprise Eli Lilly and YCOS corporation .
As compared to Viagra on the basis of the information on pharmacogenetics Cialis has some benefits. Thereby, with Cialis erection lasts up to 36 hours (in 20 mg dose), with Viagra - 4-6 hours.
Viagra and Cialis side effects are quite close: headache, vertigo, nausea, diarrhea, color-vision defect, symptoms of influenza (stuffy nose), pain in the back, muscle pain.
Levitra
At present, a recent product Levitra (Vardenafil) has appeared on the worldwide pharmacological market. 80 percent of men taking Levitra irrespective of their age pointed to its favourable influence on the II phase of clinical testing.