Viagra pills

About Viagra

Viagra is an effective drug for the treatment of erectile dysfunction. It increases blood flow to the penis. It works by:

  • Increasing the amount of nitric oxide produced in the penis
  • Increasing the amount of cGMP produced in the penis in response to the nitric oxide
  • Eliminating the PDE5 in the penis so that the cGMP builds up instead of getting decomposed by the PDE5

Viagra eliminates the PDE that decomposes the cGMP, so that the cGMP builds up in the penis and has a greater effect on the artery walls. The enhanced the amount of cGMP is the greater is the blood flow; the greater is the blood flow the greater is the degree of erection.

The reason that Viagra uses this technique is because of an interesting peculiarity of PDE.

It turns out that the human body produces at least 11 different kinds of PDE. Only one of those kinds of PDE - the PDE5 - is found primarily in the penis. Once this fact was discovered, the creation of Viagra was relatively simple. Pfizer found a chemical that would selectively block PDE5 and nothing else. With the PDE5 blocked, cGMP could build up in the penis and increase the blood flow there without affecting other parts of the body.

PDE5 is an enzyme that is a specially folded protein that can speed up a chemical reaction. Sildenafil, the active ingredient in Viagra accepts the cGMP and breaks it down. It fits right into the PDE5 enzyme and disables it.

When a man takes a Viagra pill, the Sildenafil citrate flows throughout his body, only affecting the PDE5 enzyme in the penis. It stays in the bloodstream for about four hours, and is then washed out of the blood by the liver and the kidneys.

Viagra is both well-tolerated and effective even when used in conjunction with high blood pressure medications. However like other prescription medications, it also has its share of the side effects, most of which are mild to moderate and short-lived. The most common side effects include headache, facial flushing, indigestion, dizziness, nasal congestion and abnormal vision.

Precautions and warnings before you Buy Viagra

Viagra is indicated for the treatment of erectile dysfunction (ED). Being a prescription drug, it is best to adhere to Viagra precautions and warnings. It is essential that you let your healthcare provider know about certain health conditions before you get a prescription for Viagra. As Viagra can interact with certain medications (such as alpha blockers), it best to let your healthcare provider know about the medications you are on. Moreover Viagra does not protect against sexually transmitted diseases or HIV, nor does it act as a contraceptive.

You must let your healthcare provider know before taking Viagra (Sildenafil citrate) if you have:

  • Heart disease or blood vessel disease
  • Liver disease or liver failure
  • A history of a heart attack, stroke, or life-threatening arrhythmia within the past six months
  • Retinitis pigmentosa, which is a rare eye problem
  • Low blood pressure (hypotension)
  • High blood pressure (hypertension)
  • Sickle cell anemia
  • Multiple myeloma
  • Leukemia
  • A history of priapism, which is a painful erection lasting longer than six hours
  • Any condition that causes a penis deformation, such as angulation, Peyronie's disease, or cavernosal fibrosis
  • Any allergies

In addition, it is best to tell your healthcare provider about all the medicines you take, including prescription and non-prescription medicines, antacids, vitamins, and herbal supplements. Certain medications that Viagra can interact with are:

  • Cimetidine
  • Protease inhibitors
  • Amlodipine
  • Alpha blockers for high blood pressure or benign prostatic hyperplasia
  • Erythromycin
  • Saquinavir
  • Antifungals
  • Nitrates

In cases of heart or blood vessel disease (cardiovascular disease) or significant heart disease risk factors, taking Viagra can result in serious side effects. On rare occasions, Viagra can also affect the heart, brain, and the blood vessels causing heart attack, stroke, or sudden death.

People on Viagra or on any other PDE5 inhibitor, can sometimes face a rare condition called non-arteritic anterior ischemic optic neuropathy (NAION), which can lead to sudden loss of vision in one or both eyes.

Viagra is considered a pregnancy Category B medicine, which means that the drug has not been studied in pregnant women, but it showed no negative effects on unborn babies in animal studies. However, Viagra is not licensed for use in female patients.

In rare cases, individuals on Viagra can experience a prolonged erection (longer than four hours), which can be very painful.

On rare instances there have been cases of a sudden decrease in hearing or loss of hearing in people taking Viagra.

You should not take Viagra if:

  • You are allergic to any of the active or inactive components of Viagra
  • You are below the age of 18 years
  • You are a lactating mother
  • You are pregnant
  • You must use a starting dose of 25mg if you have increased plasma levels (age >65, hepatic impairment, severe renal impairment, and concomitant use of potent CYP450 3A4 inhibitors)

  • You should not exceed 25mg tablet in a 48-hour period if you are on ritonavir

Availability of Viagra

While there were many men who had no problem visiting a doctor, there were some who did have a problem revealing the fact that they were having a difficult time achieving an erection. But times have changed and getting Viagra is now as simple as a stop at a local pharmacist. Now a man can buy Viagra without having to come face to face with embarrassing questions and yet maintaining their privacy.

Now getting Viagra is as simple as entering a search term, clicking a couple of links, filling in some information related to your medical history, completing an online consultation, getting a prescription and Viagra is then on its way that will be delivered right to your doorstep. All this can be done comfortably sitting at home, over the internet with ease. Nevertheless, it is best to scrutinize websites very closely before actually entering into the buying process.

Viagra has changed the way people live. Most msen can now lead happy and fulfilled lives. Viagra is a safe treatment for erectile dysfunction. Although, Viagra is easily available, it is essential that men taking nitrates for chest pain should not take Viagra without consulting a doctor.

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