One brand of e-liquid could cause a rather embarrassing situation for users after it has been found to contain viagra

Chinese vaping company, HelloCig Electronic Technology Co, could now face stiff penalties in the US after using the erection drugs Viagra and Cialis in their ingredients

There are warnings the drug could potentially cause erections that last up to two days and other health risks

No prescription drug is approved to be inhaled partly because no studies have been conducted on the risks, officials say, making this operation illegal

They warn users that the active ingredients tadalafil and sildenafil can turbocharge hypertension medications, driving down blood pressure dangerously low

Dr Premal Patel, a urologist at the University of Miami, warns the product is a major concern because heart medications are common among men with erectile dysfunction problems

"We are learning more and more than erectile dysfunction could be a harbouring of cardiac problems in the future,' Dr Patel told DailyMail.com

As a urologist, he says, it's part of the job to check patients' heart health too, and to be aware that drugs like Cialis or Viagra "have side effects if you take them with medication"

"So putting them in a vape... especially if it's not declared, it's risky," he says

The Food and Drug Administration issued a warning letter to the Chinese company, asking them to change their products, which are made in China but sold in the US.