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Erection and flaccidity of the penis is a vascular phenomenon. The penile erectile tissue or the corpora cavernosa plays a key role in the erectile process. Sexual stimulation triggers the release of chemicals which cause relaxation of smooth muscles. This increases blood flow in the arteries and the smaller arterioles. The incoming blood is trapped by the vascular spaces. The venous outflow is reduced by compression of the veins. The partial pressure of oxygen in the blood rises from 35 to 90mm/hg and the pressure in the cavernosa climbs to 100mm/hg which erects the penis. A rigid erection occurs with further contraction of the pelvic floor muscles. The rigid penis becomes flaccid with a slow opening of the venous channels and then a fast pressure decrease with a fully restored venous outflow.
The first oral medication for ED approved by the FDA, Viagra was released by Pfizer in 1998. Today, sildenafil is also sold as a drug for a certain type of high blood pressure in the lungs under the brand name Revatio. How does Viagra work? Viagra works by stopping the chemical reaction that causes blood to leave an erect penis. Viagra blocks cGMP-specific phosphodiesterase type-5 (PDE-5), an enzyme that encourages blood to flow out of the penis. When PDE-5 is inhibited, levels of cGMP remain elevated, which relaxes smooth muscle and encourages blood vessels to widen (a process known as vasodilation). That makes blood flow more freely, including to the penis.
Decreased libido can be a consequence of a physical illness, the administration of certain medications, stress or psychological factors. Sometimes the pain of sexual intercourse or unrealistic expectations can lead to loss of interest in sexual activity. To solve the problem it is very important to detect the cause.
The first thought that comes into the mind of the woman is that she should not stimulate him enough. If she does this, then he is bound to ejaculate quickly and this definitely is an issue. As she does not stimulate, the man might have Erectile Dysfunction which only complicates the matter. The other important thing that happens is that women with partners who have PE don’t focus or get involved in the act. This is because she is afraid that the entire sexual act may be over before she actually starts deriving enjoyment from the act. This is a learnt behavior. She had tried this a few times before and every single time this had ended in disappointment. A few women who are endowed with great orgasmic ability may try to reach orgasm before the man unsuccessfully ejaculate thereby increasing their frustration. Even if they do in few cases, the effort is like homework which ceases to be associated with pleasure after some time. The worst case scenario is that the woman may fail to get turned on. Discover additional details at instadocnow.com.
Don’t Give Up: Viagra may not work the first time you take it. This is not the case for most people, but it is perfectly normal for the drug not to work after the first few attempts. It can actually take up to six attempts for Viagra to get into your system and exert its full effect. If you feel like it’s not working early on, try it a few more times before turning to an alternative. Buy from a Registered Pharmacy: Buying Viagra (or its generic form sildenafil) from a reputable source is a must.