Your first step is speaking with a doctor. Many men are understandably reluctant to bring up the topic of erectile dysfunction, but it is no longer the taboo it once was. Your doctor, of course, will want to know your medical history, and whether you have a personal or family history of heart disease, or are otherwise at elevated risk.
That said, Viagra has been taken safely and successfully by men worldwide, and it wouldn’t be the blockbuster drug it’s been for nearly 20 years if there wasn’t extensive data on its effectiveness and safety.
Start that conversation. Your doctor won’t be offended or surprised. On the contrary, he or she will probably be happy that you have shared a medical concern and are willing to work on treating it.