It only comes in one dose: 50mg. Cialis Tadalafil is a tablet that does the same job but works for up to 36 hours, Stendra Avanafil has a faster average response time of 15 minutes, and Levitra Vardenafil is a more potent drug and is thought to be less likely to cause side effects. Contact your medical provider if you experience any side effects during treatment. So in answer to the question: is Sildenafil just a cheaper version of Viagra? It’s best to check your chosen provider’s site for more information. Can women take Viagra?If you’re interested in buying Viagra online, five of the best options available are Hims, Roman, Lemonaid, Optum Store, and REX MD. Read on for full details on the process . AdFree & Private Online Consultant with Real Doctors. Reliable E.D. Meds Shipped Discreetly. Save Time & Money with Online Prescription for Viagra, Cialis, Sildenafil and TadalafilK+ visitors in the past monthFree Shipping · Real Doctors · Discreet Packaging · Personalized Plan. Sildenafil The original ED medication. Our average rating based on reviews. Express shipping US clinicians Starting from $ Get your treatment We’ll deliver to .