What is viasek?

It is anorally consumed product, which belongs to a class of so-calledphosphodiesterase inhibitors (PDE), and is used to treaterectile dysfunction and pulmonary arterial hypertension.

Note: It was originally developed by British scientists and then brought to market by the pharmaceutical company Pfizer.


The main and only component issildenafil or sildenafil.

Presentations and dosage

Coated tablets in packs of1, 2 and 4 of 25 and 50 mg. for oral use.

Dosage: The recommended dose is50mg taken on demand up to a maximum of100 mg. per day orally.

Uses of viasek

The main component of viasek, which is sildenafil, is indicated for two main pathological conditions, which we mention below:

Erectile dysfunction

Sildenafil is a product used to Treat erectile dysfunction because it increases blood flow to the penis during sexual stimulation. That increased blood flow can cause an erection.

To highlight: An article from the Mexican Journal of Urology affirms the safety in the use of sildenafil in the treatment of erectile dysfunction as well as other pathologies. (1)

Pulmonary arterial hypertension

Sildenafil Pulmonary arterial hypertension treats by relaxing the blood vessels in the lungs to allow blood to flow more easily. A study entitled “Sildenafil and phosphodiesterase inhibitors in pulmonary hypertension” affirms the use of this active principle for the treatment of pulmonary hypertension. (two)

On the other hand, sildenafil is also used in the treatment of pulmonary arterial hypertension and improves exercise capacity in men and women.

In addition, research is being carried out on the use of sildenafil in processes of sexual dysfunction in women such as decreased libido, vaginal dryness, dyspareunia and delayed orgasm, as well as other conditions. (3)

Note: There is viasek gel , indicated to provide relief from the symptoms of vaginal dryness or dyspareunia.

Viasek contraindications

There are certain pathological conditions of the human being, which prevent the use of this medicine, and in priority cases, its administration must be supervised by a specialist. We show you the most common:

Allergy to components

If you experience swelling of the face, lips, throat, or eyelids or difficulty breathing at the time of taking viasek, these symptoms may indicate an allergic reaction. Discontinue use and consult a doctor.

cardiovascular disorders

For patients who suffer from heart conditions or are sedentary , a Cardiovascular evaluationshould precede the use of this product. should precede prior to use of this product.

Note: An article published in the Chilean Medical Journal indicates the performance of cardiovascular assessments before the use of sildenafil in certain conditions in man. (4)

Care should be taken with the use of sildenafil , as sexual activity can put a strain on the heart, especially if you have heart disease.

Liver failure

The safety in the use of sildenafil has not been studied in patients with severe hepatic insufficiency, therefore it is advisable to consult your doctor before using it.

Ischemic optic neuropathy

Ischemic optic neuropathy is the sudden loss of central vision, side vision, or both, due to decreased or interrupted blood flow to the optic nerve. Sildenafil can decrease blood flow to that nerve, causing sudden vision loss.

Important: This medicine is contraindicated in those patients suffering from retinitis pigmentosa.

An article in the Annals of Internal Medicine magazine describes the action of this component on certain optical conditions. (5)


Priapism is an unwanted and persistent erection that lasts more than 4 hours. It can occur spontaneously or be related to the use of certain antidepressants or drugs to treat erectile dysfunction.

If sildenafil has been used and the erection lasts a long time, blood becomes trapped in the oxygen-poor corpora cavernosa and begins to damage or destroy penile tissue. Discontinue use and seek immediate medical help.

Interaction with other drugs

Sildenafil is a component that causes vascular vasodilation in the muscles , enhancing the hypotensive effectsof nitrates. That is why its administration accompanied by medications that provide nitric oxide or nitrates is contraindicated.

Viasek Side Effects

There are people who are sensitive to the use of this medicine,and manifest uncomfortable effects in the body during its consumption. If you manifest any of them, inform your doctor.

Respiratory disorders

Respiratory conditions can occur in the use of viasek, such as: flu, bronchitis, cough, nasal congestion, among others.

Gastrointestinal disorders

In certain people, the use of viasekcan cause discomfort in the digestive tractsuch as: diarrhea, abdominal discomfort, gastritis, gastroesophageal reflux, hemorrhoids, bloating, dry mouth.

Visual disturbances

Headache and muscle

The appearance of headaches and discomfort in the musculoskeletal apparatus such as pain in the extremities, muscle pain and back pain has been reported.

Anxiety and insomnia

The appearance of anxiety states and sleep disorders such as insomnia has also been reported in patients or people who have used this medication.


Night sweats

Night sweats are a side effect that appears frequently in people who consume sildenafil very frequently. This disease is characterized by increasing body temperature during sleep.

Note: There is no evidence that sildenafil causes dependence.

Key Findings

  • Viasek is mainly used to treat Erectile dysfunction in men and pulmonary arterial hypertension in both sexes.
  • Its main component is sildenafil or sildenafil.
  • Its administration must be supervised.
  • Improves ‘s sexual activity
  • There is viasek gel, used for certain sexual dysfunctions in women.

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