Access to Viagra (sildenafil) online in the United States requires a prescription from a healthcare provider [1]. Purchasing prescription medications like Viagra from unverified online sources can pose risks, as these sites may not be legitimate pharmacies and could dispense counterfeit or substandard products [2].
How to Safely Buy Viagra Online
To obtain Viagra online safely, ensure the website is a verified online pharmacy and requires a valid prescription [2]. Reputable online pharmacies often have licensed pharmacists available to answer questions [3]. Consumers should look for the National Association of Boards of Pharmacy (NABP) Verified Internet Pharmacy Practice Sites (VIPPS) accreditation or similar state board of pharmacy verification [4].
What Are the Risks of Unregulated Online Pharmacies?
Unregulated online pharmacies may dispense drugs that are counterfeit, expired, or contain incorrect dosages. They might also offer prescription drugs without requiring a prescription, which is illegal and unsafe [2]. Patients obtaining medication from such sources risk receiving ineffective treatments or harmful substances [5].
Are There Alternatives to Viagra?
Yes, there are other medications available for erectile dysfunction, including Cialis (tadalafil), Levitra (vardenafil), and Stendra (avanafil) [6]. These medications work differently and may have varying effectiveness and side effect profiles. A healthcare provider can help determine the most suitable option [7].
When Does Viagra's Patent Expire?
Viagra, manufactured by Pfizer, has been off-patent for many years, allowing for the availability of generic sildenafil [8]. The original patents for sildenafil citrate have long expired, making generic versions widely accessible [9]. This patent expiry has led to significantly lower prices for the medication [8].