SPRINGFIELD -- The U.S. Food and Drug Administration is continuing its crackdown of fraudulent products claiming to prevent and cure the H1N1 flu. However, just because it's not on the FDA's list of fraudulent products, it doesn't necessarily mean you can assume it works.

When it comes to products claiming to prevent and cure the H1N1 virus, some are legitimate but many are not. One that isn't is the online store supposedly selling Tamiflu. When analyzed by the FDA, the tablets were found to contain talc and acetaminophen but none of the active ingredients in Tamiflu.

There are thousands of other products out there that can't be classified as real or fake, like air sanitizers claiming to kill H1N1 and other dangerous viruses. Clay Goddard, assistant director of health at the Springfield-Greene County Health Department says, if it's truly a virucide, it'll probably work, but he worries what's inside the can might not do what the outside says it will.

"It's easy to be fly-by-night on mail order and the Internet. Anyone can put up a Web site up claiming to do something," said Goddard.

The FDA constantly updates its list of fraudulent products, but there are new Web sites and new products coming out every day. Goddard says, to be sure you're not getting ripped off, go with brands you know and trust.

"Are they virucide? Do they contain bleach or alcohol? Those will be most effective. If they promise to scrub the air, there's a good chance they haven't been thoroughly tested," said Goddard.

The FDA is doing its best to keep up to date with all the products on the market. Check out the box below that allows you to easily check for fraudulent products.