Viagra is a very popular medicament for ED curing. Many people interested in how the medicament works when it starts its action, how long it acts and whether it prolongs the duration of coitus.

Mechanism of action of the drug

How does Viagra work? The active agent of the medicament inhibits phosphodiesterase of fifth type (special enzyme). This inhibition allows NO and cGMP (cyclic guanosine monophosphate) to enhance their vasodilatory effects, which in turn lead to improving erection.

How long does it take for Viagra to work?

The medicament becomes effective in about half an hour after its taking. It is important to note that a simple ingestion of blue tablet (without reaching a sexual arousal) does not cause a penile erection.

How long does Viagra take to work when eating fatty foods?

Using Viagra after eating fatty foods (cheese, products with vegetable oil, fatty meat etc.) slows down the absorption of the drug into the blood, so the drug may begin to act later than expected – only in 1-2 hours after taking.

How long does Viagra last?

The length of the medicament action varies from man to man. According to the drug producer’s instruction, sildenafil works approximately for five hours if it comes with sexual stimulation. But many male persons find out that the blue tablets act only for two-three hours. There are some factors that can influence the drug work period. They include:
I) Age. Male persons over 65 years old have a slow metabolism. Because of this, an active agent of the medicament will stay for longer time.
II) Spirits. Drinking alcohol reduces the level of blood circulation in penis, so getting and keeping penile erection become harder;
III) Dose. The medicament comes in 25, 50 and 100 mg dosages. As a rule, higher dosages work longer, but only a qualified healthcare professional can choose the recommended tablet strength for you.
IV) Health problems. If you suffer from liver or kidney ailments, the effect of the medicament can last longer. For example, diseased kidneys will slowly dispatch with the active agent of the drug.
V) Interactions with other remedies. Some medicaments may prolong or reduce the duration of the effect of sildenafil. For instance, rifampicin (the antibiotic remedy applied for curing tuberculosis) can reduce or neutralize the effect of the medicament. Consult your health care expert if you take any type of other medicaments.

Does Viagra make you last longer?

Many men are interested in the question: Can Viagra prolong sexual intercourse? Researchers reviewed fourteen studies, regarding the effects of PDE5 inhibitors including Viagra online, on male persons having premature ejaculation. Eleven of the conducted studies showed that the medicament helped to prolong the time before orgasm. Does this information mean that you can have sex all night long with the help of blue tablets? Experts say that although this interrelation was discovered, it is hard to identify whether or not anti-ED medicaments really delay the moment of reaching orgasm because many studies didn’t compare achieved results against innocuous medications (i.e. placebo).

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