Can Viagra Help Stop Cancer From Spreading? Scientists Say It's Too Early to Tell

Viagra has spent nearly three decades being famous for one thing: treating erectile dysfunction. It has become one of the world's best-known medicines, its name recognised far beyond doctors' clinics and pharmacies. But science has a funny habit of giving old medicines new jobs. Now, researchers believe Viagra's active ingredient, sildenafil, could one day help slow the spread of cancer.

A new study published in the journal Cancer Research suggests that sildenafil may interfere with metastasis: the process by which cancer spreads from its original location to other parts of the body. The research was carried out by scientists at Israel's Weizmann Institute of Science in collaboration with Clalit Health Services.

The researchers didn't stop at laboratory experiments on cancer cells and mice. They also analysed the medical records of nearly five million people collected over more than 20 years. Among them were more than 40,000 men diagnosed with cancer. The researchers observed that men who had used Viagra before being diagnosed with cancer appeared to have better survival rates than those who had never taken the medicine. Survival rates were even higher for men who had taken both sildenafil and statins.

However, they were quick to point out that the study does not prove Viagra was directly responsible for the improved survival. The findings show an association, not cause and effect. Before anyone rushes to the nearest pharmacy, the researchers have an important message: this is promising early research, not proof that Viagra is a cancer treatment.

How Could Viagra Affect Cancer?

Cancer cells are remarkably resourceful. To break away from the original tumour and travel through the body, they rely heavily on cholesterol, which helps them build and maintain the protective outer membrane surrounding each cell. The researchers discovered that sildenafil blocks a protein responsible for transporting cholesterol inside cells. Without enough cholesterol, cancer cells can't maintain their outer membrane, making it harder for them to spread to other organs.

Also read: How Much Fibre Do You Really Need To Consume To Lower Cholesterol?

Stronger Effect With Cholesterol-Lowering Drugs

The study also found that sildenafil became even more effective when combined with statins, the commonly prescribed medicines used to lower cholesterol. Together, the two drugs appear to block cancer cells from both using existing cholesterol and making new cholesterol. This double attack could make it even more difficult for cancer cells to travel around the body. The results are promising, but scientists caution that the study is in its infancy. It does not mean people with cancer should start taking Viagra without medical advice.

Scientists Urge Caution

Researchers say the results are exciting but should not be interpreted as a new cancer treatment.

Much larger clinical trials involving patients are still needed before sildenafil can be considered part of standard cancer care. Until then, doctors strongly advise people not to self-medicate or take Viagra in the hope of preventing or treating cancer. Another important limitation is that most participants in the study were men, so it remains unclear whether the same effect would be seen in women.

Viagra has had a curious career. It was originally developed to treat high blood pressure and chest pain caused by reduced blood flow to the heart. During clinical trials, researchers noticed an unexpected side effect that eventually made it one of the most widely recognised treatments for erectile dysfunction. Now, scientists are exploring whether the same medicine might find yet another purpose: helping slow the spread of cancer.

(Disclaimer: The information provided in this health article is for general informational purposes only and is not intended as medical advice. It is not a substitute for professional healthcare consultation, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.)

Also read:

1. How Smarter Radiation Therapy Is Helping Patients Live Better, Not Just Longer
2. WHO Report Predicts Cancer Cases To Rise To Nearly 35 Million By 2050
3. Indian Institute of Science Researchers Are Using Ultrasound To Attack Oral Cancer Cells