When you make the appointment, be sure to ask if there’s anything you need to do in advance. Medical consultations were also taken into consideration, as PDE5 inhibitors require a valid prescription from a licensed medical provider. Being overweight can cause — or worsen — erectile dysfunction. There are many factors to considering when shopping for health insurance including rate, coverage, HMO vs. If you have an erection that lasts more than 4 hours, get medical help right away. You’ll soon start receiving the latest Mayo Clinic health information you requested in your inbox. What, if anything, seems to worsen your symptoms?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 . Best Low Cost: GoodRx Fastest Delivery: Blink Health: Sesame Sign Up Now Key Specs Cost: Consultation prices vary based on the prescriber; $5 generic . Sildenafil (Viagra) Tadalafil (Adcirca, Cialis) Vardenafil (Levitra, Staxyn) Avanafil (Stendra) All four medications enhance the effects of nitric oxide — a natural .