Viagra is a unique remedy for the treatment of the erectile dysfunction which was released in 1998. This drug is unique because it is the first remedy which was specially developed for the treatment of the sexual dysfunction.
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Viagra brand name appeared in 1998 when FDA approved the active component Sildenafil citrate as a medication restoring potency. Initially, Sildenafil was indicated for the treatment of the cardiovascular diseases but unfortunately it did not provide an effective action but favored the increase of the blood circulation in the penis. Employees of Pfizer used this and considered quickly that it is possible to use this drug and created Viagra. The next drugs for the treatment of the erectile dysfunction were developed on the basis of Viagra. And therefore Sildenafil is a certain example which is today one of the most popular and effective methods of the erectile dysfunction treatment all over the world. Lately an interest in Viagra in New Zealand was shown. Due to the active sale of Viagra online men all over the world may estimate the efficiency of this drug easier than several years ago.
The active component Sildenafil causes a relaxation of the smooth muscles of the penis by means of the increase of the level of nitric oxide produced from the cavernous bodies. The relaxation of the smooth muscle of the penis causes a dilation of the vessels of the arteries, and so penis starts getting more blood and this results in the erection.
A peculiarity of Viagra is that this drug not only restores potency but also maintains it reducing venous outflow of the blood from the cavernous bodies. In this case, the erection of the man will be maintained needed for the satisfactory sexual intercourse.
Common use
Viagra is released in covered tablets which contain 25, 50 or 100 mg of the active ingredient Sildenafil. The man individually selects the dosage depending on his physical state.
- average dosage of Viagra is 1 tablet of 50 mg
- the maximal permissible daily dose is 100 mg
It is not recommended to take Viagra more than once per day because this may cause an excessive erection with painful sensations and this causes discomfort.
The tablets are taken at least one hour before sexual intercourse. It is possible to take it earlier. The most important is that the length of the drug action is about 4 hours, and therefore you should plan time of the tablet use. It is risky to take the drug less than one hour because the active components may not work fully in the needed moment and so the erection will be weak.
Precautions
- It is necessary to eliminate the use of Viagra after the consumption of alcohol. This may affect the opportunity to gain erection.
- Aged men have to show a special caution because they need an adjustment of the daily dose.
Contraindications
- Viagra is contraindicated men with cardiovascular diseases because it slightly causes the load to the cardiac muscle.
- It is also not recommended taking Viagra in case of the anatomic affections of the penis, men younger than 18 years old and also allergic reaction to Sildenafil.
Drug Interaction
Sildenafil may increase the hypotensive action of nitrates because of the vasodilating effect, and therefore it is not recommended to combine drugs with nitrates with Viagra.
Possible Side Effects
The side effects of Viagra are dizziness, headache, stuffiness in nose, and pain in back.
In rare cases men may experience temporal change of the vision or pain in the chest.
The side effects are not a consequence of any serious disorders but they only indicate the body reaction to the new drug. Therefore, oftentimes, the side effects do not need a medical intervention while taking Viagra.