Physical causes There are several physical factors that can cause erectile dysfunction. Additionally, each drug is differently affected by the ingestion of food. Individual Results May Vary: Please be aware that individual experiences with medications like these may vary. This information is reviewed by a licensed practitioner who will assess your eligibility for the medication. Viagra-specific side effects include nausea, dizziness, abnormal vision, and a rash. This increase in blood flow results in a firmer, longer-lasting erection.Get started. Get Cialis and Tadalafil pill online. Try the generic Cialis option for a fraction of the cost, after speaking with one of our online medical g: forum. 1. Third Avenue Cialis – Most effective & editor’s choice Topping our list as the best place to buy Cialis online is Third Avenue. Third Avenue is a patient Missing: forum. Best Low Cost: GoodRx Fastest Delivery: Blink Health: Sesame Sign Up Now Key Specs Cost: Consultation prices vary based on the prescriber; $5 generic Missing: forum.