Bing is rolling out a new search feature that warns people who may be about to buy some bad medications.

Online pharmacies offers customers cheaper, more available drugs – and this can be a dangerous combination. The Food and Drug Administration keeps a list of fake online pharmacies called the Internet Pharmacy Warning Letters, and Bing is using that to warn searchers when they travel to those sites.

“When there is a significant risk of serious harm to the public from purchasing unsafe, counterfeit and other illegal drugs online, the Bing team wants to help our users make informed decisions. With this goal in mind, we are rolling out a new set of warnings on Bing.com to give our customers more information about the dangers of visiting unsafe online pharmacies,” says Bing.

Here’s what you will see if you are trying to navigate to one of the sites on the FDA’s list:

“The list of online pharmaceutical sites for which we are providing warnings will grow and evolve. We will continue to refine our efforts in this area and look for more opportunities to help our users make more well-informed decisions as additional, highly-reliable sources of information become available to us,” says Bing.