However, one of the easiest, most effective, and best-known treatments for erection problems is Viagra. It tends to be recommended to those who have tried Viagra Connect but have not seen results. It is crucial to inform your healthcare provider of all medications you are taking before starting Tadalafil. Kidney disease that needs to be treated with dialysis. They may be able to adjust your dosage or recommend alternative treatment options.Viagra vs. Viagra Connect: Decoding the Differences Table of contents How Tadalafil Works in Your Body to Treat Erectile Dysfunction. Sildenafil (Viagra). This medicine works best when you take it on an empty stomach an hour before sex. The body takes longer to absorb it after a high-fat meal or . The main difference between Viagra Connect and Sildenafil is that Viagra Connect can be purchased over the counter. They contain the same active ingredient and provide results .