The drug belongs to the therapeutic group of drugs that are used to treat erectile dysfunction in men. Many are interested in how long Viagra begins to act, and how it should be taken.
The drug is available in the form of enteric-coated tablets. The capsule contains the active component - sildenafil, its dosage can be different - 25 mg, 50 mg and 100 mg.
In addition to sildenafil, the composition of Viagra includes the following additional substances:
- Salt of magnesium and stearic acid.
- Microcrystalline cellulose.
- Calcium disodium phosphate.
- Primrose.
Capsules are placed in blisters (there are 1, 2, 4 or 12 pieces in total).
Pharmacological properties
The mechanism of action of the drug "Viagra" is that the active component suppresses the enzyme specific phosphodiesterase, which leads to an increase in the content of cyclic adenosine monophosphate, which provokes the weakening of the smooth muscles of the blood vessels of the penis and increases their filling with blood, causing an erection.
The current trace element in the Viagra has a positive effect on the processes of the appearance of an erection in a representative of a strong half of humanity during the period of excitement.
The main condition for the occurrence of a positive effect from the use of a medication is the presence of sexual activation of a man and his arousal. How long does Viagra begin to operate if all conditions are met?
After oral administration of the capsule, the active substance is rapidly absorbed from the intestine into the blood. The drug begins to act 30 minutes after use, the maximum time for the preservation of the active substance in the body is 60 minutes.
How long does Viagra begin to act if you take a pill after a meal? The absorption rate will be slightly lower than in the case of consumption before meals, but there will be no significant difference in the time interval. The main substance smoothly spreads throughout all body tissues. Its processing occurs in liver cells with the appearance of intermediate metabolic products, which are eliminated from the body with feces (up to 90%). The half-life is 4 hours.
Indications
The main reason for using capsules is the treatment of erectile dysfunction (impotence) in men. The drug helps most men with impaired erectile function achieve an erection and keep it during sexual arousal.
Contraindications
The use of Viagra is prohibited in the presence of certain pathologies of the body, which include:
- Individual intolerance or increased sensitivity to the active component, as well as other components of the drug.
- The combined use of capsules with other drugs that are considered donors of nitric oxide can lead to a hypotensive result and significantly reduce blood pressure.
- Cardiovascular diseases.
- Coronary artery disease.
- Loss of vision.
- Arterial hypotension.
- Renal failure.
How to take Viagra tablets correctly?
Instructions for use
Viagra is taken orally without regard to food. On an empty stomach, the bioavailability and absorption rate of the active substance of the drug from the intestine is greater. How much to drink "Viagra" is necessary to achieve the effect?
The capsule should be used immediately after removal from the package, since prolonged exposure to air can reduce the activity of the active substance. Also, when taking, it is necessary to hold the drug for a while in the oral cavity until it softens, and then swallow it, you can drink it with water.
How many hours does Viagra work? According to the manufacturer, the standard duration of action of the drug should be from 4 to 5 hours. At what dosage should I take the drug?
The standard dosage is 50 mg; if necessary, it can be increased to 100 mg. The maximum daily dosage is 100 mg per dose of Viagra.
How much to take the drug? To achieve a positive result, “Viagra” must be used 60 minutes before intimacy. In the presence of liver disease, the dosage of the drug is reduced to 25 mg.
Side effects
After using the medicine, undesirable reactions may appear, the frequency of occurrence of which depends on the dosage taken. Such negative phenomena are manifested by various systems, for example:
- Vomiting.
- Pain in the abdomen.
- Loss of sleep.
- Nasal congestion.
- Laryngitis.
- Urethritis.
- Cystitis.
- Pain in the muscles and joints.
- Priapism.
- Skin rash.
- Itching
- Hives.
According to reviews, contraindications and side effects of "Viagra" indicated in the instructions, as soon as there are any unpleasant sensations or rashes on the body, the medicine must be stopped and urgently consulted by a specialist.
Features
Before using the tablets, you must carefully read the instructions, as there are certain instructions for taking:
- It is important to use pills with caution to representatives of the strong half of humanity who have penile deformity.
- You can not use the medicine for people with a predisposition to a prolonged erection.
- For a positive effect after using the medication, sexual activation is needed.
- It is not recommended to take pills for men who are prohibited from sexual activity, especially as a result of serious cardiovascular diseases.
- The drug is not recommended for women.
- Do not take capsules for children and adolescents under 18 years of age.
At drugstores, Viagra is available over-the-counter. If you have any problems or doubts regarding the use of the medicine, you should consult a doctor.
Overdose
With an excessive increase in the pharmacological dosage of Viagra, side effects from various body systems occur. In such situations, it is necessary to wash the stomach, as well as the intestines and symptomatic therapy.
Analogs
Analogues of Viagra tablets:
- Cialis
- Levitra.
These drugs differ in composition from Viagra, but the effect on the human body is identical.
The generics of this drug are:
- "Wooka Wook."
- "Konegra".
- "Suhagra".
- "Kamagra".
As you know, generics are cheaper drugs, which in composition completely copy the original drug. Generics "Viagra", "Cialis" and "Levitra" can be easily purchased in almost any pharmacy chain in our country, they are produced mainly in India.
How to store the medicine and its cost
The shelf life of the drug from the moment of production is 60 months. The medicine should be stored in a dry, dark place at an air temperature of no more than 25 ° C.
The cost of tablets depends on the dosage and number of capsules in the package:
- 25 mg, 1 tablet - 650 rubles.
- 25 mg, 4 capsules - 2500 rubles.
- 50 mg, 1 tablet - 700 rubles.
- 50 mg, 2 tablets - 1400 rubles.
- 50 mg, 4 capsules - 2300 rubles.
- 100 mg, 1 tablet - 900 rubles.
- 100 mg, 2 capsules - 1600 rubles.
- 100 mg, 4 tablets - 2700 rubles.
Interaction with other medicines
When using the drug with other drugs, their compatibility must be considered. The metabolism of the main substance occurs directly in hepatocytes, therefore, the reduction of the effect of the active trace element depends on medications that affect the cytochrome P450.
Joint use with ketoconazole, cimetidine, erythromycin and other inhibitors reduces the clearance of the active trace element. The drug is wonderfully combined with strong CYP3A4 inhibitors, provided that it is taken in recommended doses.
Sildenafil at a dosage of 50 mg does not provoke an additional increase in the bleeding period when using acetylsalicylic acid at a dose of 150 mg. It is not recommended to take tablets at the same time as nitric oxide donors, since the active component increases their hypotensive effect.
The combined use of antihypertensive drugs does not provoke the appearance of negative reactions. In a standard dosage (50 mg), sildenafil does not enhance the hypotensive effect of ethyl alcohol.
Opinions about the drug
According to reviews, “Viagra” has proven itself in the elimination of erectile dysfunction in men, which are the result of health problems, emotional stress or age-related dysfunction of the patient’s body. When using the medicine, in accordance with the instructions for use, it has a positive effect. Since Viagra is available in various doses, this simplifies the choice of dosage regimen in each individual case. How long does Viagra begin to act? A significant advantage is that the drug begins to act one hour after application.
The drug also helps healthy representatives of the strong half of humanity, who have no problems with potency. They take "Viagra" in order to feel the new colorful emotions. But the medication should be taken only after visiting a specialist in order to exclude the occurrence of side effects when using Viagra tablets, which are most often associated with cardiovascular diseases.