Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients.

Podcast Summary

Introduction: Dr. Warrick Bishop is a practicing cardiologist and author dedicated to patient education about heart health. In this episode, he provides a comprehensive overview of Viagra, discussing its mechanism of action, uses, availability, dosing, and important safety considerations—particularly for cardiac patients who may encounter dangerous drug interactions.

Key Takeaways:

• Viagra (sildenafil) is a phosphodiesterase-5 inhibitor that increases nitrous oxide in blood vessels, relaxing them and improving blood flow to the penis and lungs.

• The drug was discovered by Pfizer in 1989 while researchers were actually searching for anti-anginal medications, making its primary use a serendipitous discovery.

• Alternative phosphodiesterase inhibitors exist in the market, including Levitra (which works more rapidly) and Cialis (which has a longer half-life).

• In Australia, Viagra can be accessed through prescription or online retailers, with 100mg tablets available cheaply; splitting higher-dose tablets with a pill cutter provides the most cost-effective option.

• Viagra is most effective for erectile dysfunction caused by psychological factors or age-related fatigue, not for dysfunction stemming from arterial disease or nerve damage, which require specialist evaluation.

• A critical warning exists against combining Viagra with nitrate-based medications (GTN spray, isosorbide mononitrate), as this combination can cause dangerous drops in blood pressure.

• Patients taking Viagra who develop chest pain and call an ambulance must inform paramedics about the medication to prevent life-threatening interactions with emergency GTN treatment.

• Viagra can cause side effects including facial flushing, vision and hearing issues, and priapus (prolonged, problematic erection), so first-time users should start with very low doses.

• Beyond erectile dysfunction, Viagra is prescribed for pulmonary hypertension, where increased blood flow to the lungs helps reduce dangerously high lung pressure.

• The medication should be taken approximately 30 minutes before use and remains effective for two to four hours.