Viagra is a medication used to treat erectile dysfunction [1]. It contains the active ingredient sildenafil [2].
How does Viagra work?
Viagra works by increasing blood flow to the penis during sexual stimulation [1]. It achieves this by relaxing the muscles in the blood vessels of the penis [1].
What is the difference between Viagra and generic sildenafil?
Viagra is the brand name for sildenafil [2]. Generic versions of sildenafil contain the same active ingredient and are generally considered to be therapeutically equivalent to Viagra [2].
When does Viagra's patent expire?
Information on specific patent expiration dates for Viagra can be found on resources like DrugPatentWatch.com [3]. Patents for medications are complex and can involve multiple patents covering different aspects of the drug, such as its composition, method of use, and manufacturing process.
Who makes Viagra?
Viagra is manufactured by Pfizer Inc [1].
What are the risks or side effects of Viagra?
Common side effects of Viagra can include headache, flushing, upset stomach, nasal congestion, and visual disturbances [1]. It is important to discuss potential risks with a healthcare provider [1].
What happens if you take too much Viagra?
Taking more than the prescribed dose of Viagra can increase the risk of side effects. It is crucial to follow the dosage instructions provided by a healthcare professional [1].
Can Viagra be used for other conditions?
Sildenafil, the active ingredient in Viagra, is also prescribed under different brand names for other medical conditions, such as pulmonary arterial hypertension [4].
Sources
1. https://www.viagra.com/
2. https://www.accessdata.fda.gov/drugsatfda_docs/label/2007/020895s034lbl.pdf
3. https://drugpatentwatch.com/
4. https://www.revatio.com/