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Brand Viagra (sildenafil) is an oral medication used to treat symptoms of erectile dysfuction.

Drug description

Viagra is an oral drug that is designed to normalize erectile function in men with impotence, inability to experience or maintain an erection. The action of the drug is aimed at ensuring prolonged arousal, which is necessary for full sexual intercourse. The reason for the decrease in potency in more than half of men is some physical disorders in the body, such as diabetes mellitus, heart and vascular diseases, and urological inflammatory processes. In other cases, the causes of impotence are psychogenic.

Initially, the drug was studied as a medicine for angina pectoris, and sildenafil has also been successfully used to treat patients with pulmonary arterial hypertension, in which high blood pressure in the vessels that carry blood to the lungs causes shortness of breath, dizziness, and rapid fatigue. Sildenafil belongs to a class of drugs called phosphodiesterase inhibitors. This drug eliminates erectile dysfunction by increasing blood flow to the penis during sexual stimulation.

Viagra is not used to completely cure erectile dysfunction disorders or to enhance sexual desire. The drug does not affect the quality of sperm and the ability of a man to conceive. It is also necessary to take into account that the drug does not prevent infection with diseases that are transmitted through sexual intercourse, including the human immunodeficiency virus (HIV).

Sildenafil has undergone repeated laboratory and clinical trials, which proves its safe effect on the male body, provided that it is used in adequate doses selected individually by the doctor.

Indications

This is a potent vasodilator. Due to this ability, Viagra is successfully used to treat male erectile dysfunctions of various origins, as well as to treat treat patients with pulmonary hypertension, due to the fact that the drug lowers the pressure in the pool of the pulmonary artery.

How to take Viagra?

Before you start taking the pills, it is important to carefully read the instructions for use and take into account possible side effects. In the treatment of erectile dysfunction, it is necessary to strictly follow the medical recommendations.

Take the drug as needed before sexual intercourse begins. It is recommended to take the pill approximately 60 minutes before the start of sexual intercourse. The duration of action is 4-5 hours. The drug should not be taken more often than once a day. If you have some other diseases or take certain drugs, Viagra should be taken according to an individual scheme. You can take the pills with or without food. However, if the drug is taken with fatty food, it will take more time to achieve the desired effect.

When the drug is used for erectile dysfunction, the dose depends on the body’s response to the drug. If the drug does not work or causes side effects, it is necessary to discuss the further use of the drug with the doctor. It is not recommended to drink alcohol while taking Viagra, as this can reduce the strengh of erection and cause side effects. Also, do not drink grapefruit juiceas it can increase the level of sildenafil in the blood. This can provoke or exacerbate side effects.

Contraindications

Do not take Viagra if you have:

  • any disease, injury or deformation of the penis;
  • heart or blood vessel disease;
  • diseases that can cause bleeding, such as a stomach ulcer;
  • eye diseases that can lead to vision loss;
  • low blood pressure or angina pectoris;
  • stroke or heart attack;
  • liver or kidney disease;
  • sickle cell anemia;
  • bone marrow cancer or leukemia;
  • treatment with any medications (including herbal infusions, vitamin complexes, dietary supplements);
  • allergic reactions.

The drug cannot be used by women and children under the age of 18.

Precautions

If you have ever experienced an allergic reaction to medications, if you smoke, if you have ever had an erection that lasted several hours and if you recently lost a large amount of fluid (dehydration), you should tell your doctor about this before start using this drug.

Be sure to tell your doctor if you have or ever had pulmonary veno-occlusive disease (obstruction of veins in the lungs); stomach ulcer; heart, kidney, or liver disease; myocardial infarction; arrhythmia; stroke; chest pain high or low blood pressure; high cholesterol; bleeding circulatory disturbance; sickle cell anemia (red blood cell disease), multiple myeloma (cancer of plasma cells) or leukemia (cancer of white blood cells); factors affecting the shape of the penis (for example, angulation, fibrosis or Peyronie’s disease), diabetes mellitus, eye diseases (hereditary retinitis pigmentosa).

The drug is not intended for use in women, especially those who are pregnant or breastfeeding.

If there is a need for surgical measures, including dental surgery, you should also inform your doctor that you are using Viagra.

Side effects

About 15% of patients taking Viagra report side effects. The most common side effects are red face (one out of ten), headaches (one in six), abdominal pain, nasal congestion, nausea, diarrhea, inability to distinguish between green and blue colors, increased sensitivity to light. Cases of sudden hearing loss were rarely recorded, sometimes tinnitus and dizziness appeared. To reduce the risk of dizziness, you need to get up slowly when lifting from a sitting or lying position. If hearing changes have occurred, the patient should stop taking the drug and seek medical help immediately.
Very serious allergic reactions to this drug are rare. However, it is necessary to seek medical help immediately if there are any serious symptoms of an allergic reaction, including rash, itching, swelling (especially the face / tongue / throat), severe dizziness, shortness of breath. In rare cases, the drug can cause temporary visual impairment, which can affect the ability to drive a vehicle.

Overdose

Treatment: symptomatic; dialysis is ineffective.

Interaction with other drugs

Sildenafil enhances the hypotensive effect of nitrates and nitric oxide donors. Cimetidine, ketoconazole, erythromycin, saquinavir, ritonavir increase the concentration of sildenafil in the plasma.

Storage conditions

The bathroom is not the best place to store Viagra. Keep the drug away from moisture and heat as they may affect the medicine and how well it works. Store the drug at room temperature and away from heat and moisture, out of reach of pets and children.