Levitra vardenafil : This medication is taken one hour before sex and can last up to 24 hours. This information is reviewed by a licensed practitioner who will assess your eligibility for the medication. Make sure to get an estimate of when you can expect your prescription in the mail. Methodology We researched 19 online platforms for erectile dysfunction treatment to learn more about the process of ordering ED pills online. Generic vs. Cialis tadalafil : This ED medication works with the same principle as Viagra, but lasts up to 36 hours. Online pharmacies can be broadly categorized as: Mail-order pharmacies are operated by pharmacy benefits managers PBMs on behalf of health insurers or providers.Online pharmacies allow you to fill prescription medications from the comfort of your home using a pharmacy site or an app rather than having to fill them in person. An online . It’s no longer sold under the brand name Levitra, but it’s available as generic tablets and orally disintegrating tablets (ODTs). Common side effects of vardenafil include . Levitra (vardenafil hydrochloride) is an oral medication taken to treat erectile dysfunction (ED). It’s in the same class of drugs as other popular ED medications, including Viagra .