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Viagra drug information
What is Viagra?
Viagra is a brand name for the active drug Sildenafil. It was first developed as a treatment for high blood pressure and chest pain. However, the drug instead proved effective in treating erectile dysfunction. In 1998, Viagra became the first drug to be approved by the FDA for treating erectile dysfunction and has since been used by more than 20 million patients worldwide.
Viagra Indications
Under its brand name, Viagra is primarily prescribed for treating erectile dysfunction. It will not cause men to get an erection without first being sexually stimulated but it will help them maintain erections for longer periods of time and have harder erections. Viagra is also approved for treating pulmonary hypertension. Studies are also showing that Viagra may be useful in treating altitude sickness though it is not approved for this reason.
How Does Viagra Work?
During sexual stimulation, the body releases nitric oxide into the penile cavity. This nitric oxide triggers a chemical process in which cyclic guanosine monophosphate (GMP) is produced. GMP causes the penile muscles to relax, thus allowing increased blood flow to the penile cavity and resulting in an erection. At the same time, an enzyme called phosphodiesterase type 5 (PDE5) works against the effects of GMP, thus causing penile muscles to constrict, reducing penile blood flow, and ultimately inhibiting erection. Viagra works by stopping the effects of PDE5 allowing erections to last longer and increasing erection hardness.
Viagra vs. Levitra and Cialis
After Viagra's FDA approval in 1998, two more similar drugs for erectile dysfunction were approved: Levitra and Cialis. All three of these drugs are PDE5 inhibitors and share many similarities in terms of precautions, side effects and interactions. However, there are some important differences between Viagra and other erectile dysfunction treatments. In terms of safety, Viagra stands out above the competition. It has been used by over 20 million patients and has been tested in more than 130 controlled studies. Reports show that Viagra produces the best results in terms of quality of erection. However, Viagra has its downsides compared to other erectile dysfunction drugs. It may take slightly longer than Levitra or Cialis to come into effect and its effects wear off quicker. Though Viagra, Levitra and Cialis are similar, they should not be considered interchangeable. Talk to your doctor about which erectile dysfunction treatment is best for you.
Serious Side Effects from Viagra
Most patients taking Viagra do not experience any serious adverse effects. However, there have been rare reports of sudden vision or hearing loss. Additionally, Viagra may rarely cause priapism, a condition in which erections are long lasting and/or painful. Priapism can cause lasting penile damage and may require surgery to treat. If you experience any of these rare but serious effects from Viagra, immediately get medical attention. Viagra may also increase the likelihood of a cardiac event occurring. The likelihood of a serious cardiovascular event occurring just from the effects of Viagra is very rare. However, Viagra is typically used during sexual activity which may put an extra stress on the heart. The combination of Viagra and strenuous activity could have serious or fatal results. If you have any of these side effects from Viagra, immediately stop activity and get medical help: chest pain, extreme dizziness, fainting, jaw pain, or weakness/numbness on one side.
Common Side Effects from Viagra
Many patients taking Viagra experience side effects which typically are not serious. These side effects may include: migraine, feeling hot/tingly all over, upset stomach, cold-like symptoms, blurry vision, or changes to color perception. You should tell your doctor about these side effects promptly if they are long lasting, worsen, or are very bothersome.
When Viagra Can Be Dangerous
If Viagra is used in the presence of certain health conditions, it can be very dangerous. You should never take Viagra without first discussing your full medical history with your health care provider. Men with cardiovascular conditions, penile malformations, history of priapism, anemia, cancer, hepatic impairment, kidney disease, or over 65 years of age may not be able to use Viagra safely. Your health care provider may still prescribe Viagra to you even if you have any of these risk factors but alter your dosage instructions or advise extra precautions. Viagra can also be dangerous if it is taken with certain other medicines (see interactions section).
Viagra Interactions
Do not ever take Viagra with nitric drugs. These may include medications which are prescribed for angina, recreational "popper" drugs, or other products. Viagra may also not be safe to use if you are taking these drugs: HIV/AIDS medicines, hypertension medicines, heart medicines, or other treatments for erectile dysfunction/impotency. This is not a full list of interactions so consult your doctor for more information.
What Does Viagra Look Like?
Viagra comes in tablet form. The tablets are blue, diamond shaped, and has the word Pfizer incised on one side. However, Viagra is also available in its generic form of Sildenafil citrate and under different brand names so your medication may look different.