Authorized in March 1998, Viagra®, initially developed to treat angina pectoris and hypertension, quickly became a real revolution for men experiencing erectile dysfunction. The immediate success of this blue diamond-shaped tablet comes down to the fact that it offers safe and effective oral pharmacotherapy in the treatment of erectile dysfunction.
–
VIDEO"/>You will also be interested
[EN VIDÉO] What does urine color reveal about your health? Normally, urine is always yellow in color. In some cases, however, the urine is brown, red, green or fluorescent yellow. What does this mean and should you be concerned?
—–
Used in disorders of theerection, Viagra®, or Sildenafil (the Active ingredients and medicinal
Active principles are found in certain…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/e/c/c/eccc00be33_78221_principe-actifjpg.jpg” data-url= “https://www.futura-sciences.com/sante/definitions/medicine-active-principle-15081/” data-more=”Read more”>substance active), is often associated with small age-related weaknesses. But it also benefits men in situations of stress, or chronic diseases (obesity, depression, diabetes, Formation du cancer
The…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/a/4/a/a4aa3c526e_50034154_cancer-du-lung-cells-anne-weston-lri-cruk- wellcome-images-filckr-nc-nd-02.jpg” data-url=”https://www.futura-sciences.com/health/definitions/medicine-cancer-108/” data-more=”Read more “>cancer). Generally prescribed on a temporary basis, it does not trigger an erection on its own and only works in a situation of desire. Its effect is manifested one hour after taking and lasts an average of 4 to 5 hours.
How does Viagra® work?
Vasodilatateur, it acts specifically on the penis. The erection is dependent on the autonomic nervous system. It is due to the relaxation of smooth muscle surrounding the blood vessels. In a situation of desire, a molecule released by a neuron during stimulation binds to a receptor on another neuron, which leads to the…” data-url=”https://www.futura-sciences. com/sante/definitions/biology-neurotransmitter-788/” data-more=”Read more”>neuromédiateur NO is produced in situ, it increases the concentration of a so-called single covalent bond…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/d/0/e/d0e3dc7e1e_76472_molecule.jpg” data-url=”https://www.futura-sciences.com/sciences/definitions/chemistry-molecule-783/” data-more=”Read more”>molecule the cGMP that causes this relaxation. It follows a rush of blood in the Function of the arteries
An artery is a blood vessel that carries blood from the heart to the organs, as opposed to veins that carry blood from the organs to the heart.
If in general the blood contained in the arteries is more oxygenated…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/0/7/8/078bcbad3d_50034473_artere-sang-donnersonsang .jpg” data-url=”https://www.futura-sciences.com/sante/definitions/medecine-artere-3017/” data-more=”Read more”>arteries cavernous. At the same time, the compression of veins will oppose the outflow of blood and allow to obtain the In the case of a homogeneous and isotropic material, we can express:
rigidity…” data-url=”https://www.futura-sciences.com/sciences/definitions/physics-rigidity-2094/” data-more=”Read more”>rigidity from penis (veno-occlusive mechanism). Viagra® inhibits the action of a enzyme phosphodiesterase E5 (PDE5) which degrades cGMP. It thus facilitates erection.
What are the interactions and side effects of Viagra®?
Sold only on medical prescription (online sales without a prescription are prohibited in France), there may be undesirable effects such as headaches, facial flushing, digestive disorders but its action on the cardiovascular system remains minimal. It should not be taken in combination with other nitrated vasodilators (pathologies cardiovascular) nor with certain orgasm-enhancing products sold in sex shops (poppers) due to the risk of a sudden drop in the blood pressure.
With an improved erection in 75% of users, all causes of impotence combined, and several million prescriptions issued worldwide in 20 years, sildenafil has helped improve men’s sexual health. Without dependence The theories established by physics apply within well-defined frameworks.
La physique…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/8/9/6/896f032c90_91933_physique-def.jpg” data-url=”https://www.futura-sciences.com/sciences/definitions/physique-physique-15839/” data-more=”Lire la suite”>physique, it can nevertheless contribute to the fear of an incomplete erection “without viagra” and maintain a psychological dependence.
Interested in what you just read?
Subscribe to the newsletter Health question of the week : our answer to a question you ask yourself (more or less secretly). All our newsletters—
–
–
