Viagra is a brand of the drug Sildenafil citrate, which increases male potency. The drug was invented by the American pharmaceutical company Pfizer in the United Kingdom. Its known throughout the world as the small diamond blue pill. Although it is a branded drug, its name has been adapted into common vernacular as the drug that remedies impotence, also known as Erectile Dysfunction (ED). It is no surprise that Viagra creates revenue of 2+ billion for the Pfizer company and far outsells any other brand. The other competing branded drugs are Levitra, Cialis and Kamagra.
Impotence in men is typically referred to Erectile Dysfunction as mentioned above and it essentially means men cannot get, or maintain an erection. Thus inhibiting their sexual pleasure and performance. There are physically and non-physical explanations for this as well as physical and non-physical treatments. Obviously Viagra is a physical treatment and one which is taken orally (never more than once per 24 hours). The dosage comes in 25, 50 or 100 milligrams. The pill is taken a maximum of once per day and within 60 minutes of sexual intercourse.
The benefits of Viagra are well documented, but scientifically speaking it works because of the delayed degradation of cGMP, which controls blood flow to the penis, it allows the man to maintain a full and consistent erection. This means the man is able to enhance the performance and experience. It has also been claimed that men on viagra last longer before ejaculation. Thus enhancing the sexual experience further more for both parties. Also because the blood flow is uninterrupted the man is able to recover much more quickly after ejaculation in order to continue sexual intercourse.
There are some side affects to regular use of the Viagra drug, which is also the case for any branded Sildenafil drug (Levitra, Cialis, Kamagra). The most common side affects of these drugs are headaches and nasal congestion. Or equally a range of issues with sight, including some effects which change the colour tinge the user sees. This is because the drug can decrease blood flow to the optic nerve and in some cases even causes sudden vision loss. The vision loss was seen in patients who also had other pre-existing conditions such as heart disease and diabetes. It was also never proven as to whether the Viagra caused the blindness or these other serious conditions.
The drug is a prescription only drug, which, depending on circumstances, would be prescribed to men aged 18 to 82. It is always highly recommended that anyone speak to a doctor first before attempting to self medicate. Although this is a prescription drug it is available in most territories or there is a strong black market and online market for such goods. That includes all the Sildenafil citrate drugs. There are many online pharmacies which can ship discreetly to territories such as Australia, which are ensured to get past the Australian customs. Often shipped in separate packages if a customer orders a large quantity.
I am self employed. General Practitioner in Melbourne, VIC. My special interest: male reproductive system.