Men have been turning to the little blue pill to treat their erectile dysfunction (ED) for nearly 20 years.

It’s safe to say the drug has given millions of men a convenient and effective option for improving their sex lives.

But studies show that taking Viagra or other meds such as Cialis (tadalafil) or Levitra (vardenafil) when you don’t have erectile dysfunction can be dangerous.

Scientists note that there are risks and side effects of these medications, and there are medical conditions you can have where there could be severe consequences.

Some men use Viagra, not for ED but because they’ve heard it can enhance athletic performance.

Medics also warn that buying Viagra from an unreliable source can be risky. Drugs sold online may be fake, contaminated, or expired.

Viagra can cause side effects, such as; headache, upset stomach or diarrhoea, dizziness, heartburn, runny or stuffy nose, nosebleeds, flushing, difficulty sleeping, muscle or back pain, numbness or tingling in the hands, arms, feet, or legs, and sensitivity to light or vision changes.

Using Viagra can lead to serious risks, too, if you have an underlying medical condition.

Experts say that men with heart disease who take drugs known as nitrates can develop dangerously low blood pressure if they take Viagra.