drug "Viagra" should be taken 1 hour before sexual activity.Recommended single dose is 50 mg.In some cases the amount of drug should be increased to 100 mg or decreased to 25 mg.In particular, dose reduction is recommended for people with severe kidney failure, liver damage, heart disease.
take "Viagra" should be no more than 1 time per day.In diseases of the kidney and liver, as well as simultaneous administration of certain drugs, dosing frequency can be reduced to 1 to 2 times a day.People over 65 years of dosage adjustment is generally not required.However, the presence of chronic diseases of the people in this age group is recommended to consult with your doctor about the feasibility and safety of the receiving means to improve potency.
pills "Viagra" have side effects.The most frequent undesirable effects include dizziness, blurred vision, rapid heartbeat, decreased pressure.Furthermore, when this medication may occur stomach discomfort, nausea, diarrhea, vomiting, pain in joints and muscles.Also among side effects are allergic reatsiya a rash, conjunctivitis, respiratory failure, rhinitis, sinusitis, pharyngitis, nasal congestion, urinary tract infection.
In rare cases, the drug can cause a functional disorder of the prostate gland.Also, with the use of "Viagra" can occur prolonged erection, including those not associated with sexual arousal (priapism).Side effects usually disappear on their own.Most often they are mild or moderate severity.Adverse effects from the drugs tend to arise with increasing dose.
application before pills "Viagra" is recommended to undergo an examination of the cardiovascular system.This is due to the fact that the drug stimulates sexual activity, which provides an additional load on the heart.In some cases, "Viagra" can cause serious complications such as heart attacks, strokes, hemorrhagic stroke, major changes in pressure, ventricular arrhythmias.To avoid such problems before taking "Viagra" should consult a doctor.