Viagra is a brand name for a medication called sildenafil citrate. It was originally developed by Pfizer as a treatment for hypertension (high blood pressure) and angina (chest pain). However, during clinical trials, it was found to have a significant effect on increasing blood flow to the penis, leading to improved erectile function. As a result, Viagra was approved by the U.S. Food and Drug Administration (FDA) in 1998 as the first oral treatment for erectile dysfunction (ED).
Viagra works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5), which is responsible for breaking down a compound called cyclic guanosine monophosphate (cGMP). cGMP plays a crucial role in relaxing the smooth muscles of the blood vessels in the penis, allowing increased blood flow and facilitating an erection when sexual stimulation occurs.
It’s important to note that Viagra doesn’t cause erections on its own; sexual arousal is still required for the medication to be effective. The medication usually takes about 30 minutes to an hour to start working and can remain effective for around 4 to 6 hours. The dosage and timing should be determined by a 비아그라 구매 healthcare professional based on individual health and needs.
While Viagra has been widely used to treat erectile dysfunction, it’s important to use it under the guidance of a healthcare provider. Like all medications, Viagra can have potential side effects and interactions with other medications. Common side effects can include headache, flushing, upset stomach, and changes in vision. People with certain medical conditions, such as heart problems or those taking certain medications (especially nitrate drugs), should not take Viagra without consulting their doctor.
If you have concerns or questions about using Viagra or other treatments for erectile dysfunction, it’s best to consult a medical professional who can provide personalized advice based on your health history and needs.