You probably know that when a drug or medical device is advertised on TV, the makers have to explain the possible risks, as well as the benefits.

That's why you hear those advisories about side effects in ads for certain medications.

Now, a consumer watchdog group is calling for changes in the way drugs and devices are sold online and asking that at least six ads be removed. It's unclear whether the laws about TV ads apply online. Because of that, many ads that appear on sites such as YouTube don't feature any warnings.

The nonprofit group Prescription Project said there's a concern that drug and device makers are using the Internet to get around laws designed to protect consumers.

"Whether through a TV ad or an Internet video, the promotion of a medical device for use in complex surgery without adequate warnings is a blatant violation of the law and could put lives at risk," said Allan Coukell, director of policy for the Prescription Project. "The videos raise serious questions about whether drug and device companies are using the Internet to skirt laws that safeguard consumers."

Wednesday, it gave the Food and Drug Administration petitions requesting the removal of six YouTube videos that do not include disclaimers. The ads are also posted on the group's site.

The group also wants the Federal Trade Commission to look into the issue.