In the US – Call your doctor for medical advice about side effects. They include dutasteride Avodart, Jalyn and finasteride Propecia, Proscar. If chest pains, dizziness, or nausea are experienced during sex, the exertion should be stopped and your doctor informed. This patent was published in and expired in Conditions of Use: The information in this database is intended to supplement, not substitute for the expertise and judgment of healthcare professionals.Teva Canada launched Novo-Sildenafil, a generic version of Viagra, on the day the Supreme Court of Canada released its decision. To remain competitive, Pfizer then reduced the price of Viagra in Canada. Get an Online Medical Consultation. Today, there’s no need to visit your doctor in person to get a prescription for Sildenafil and other ED Treatments. Fill out our in-depth smart form and you’ll be assessed by a licensed Canadian physician. Get genuine brand name or generic Viagra™ or Cialis delivered discreetly to your door. Request Appointment Print Products and services Erectile dysfunction: Viagra and other oral medications By Mayo Clinic Staff Medicines that you take by mouth are called oral medicines. They’re often the first line of treatment for trouble getting or keeping an erection, called erectile dysfunction (ED).