Dietary supplements are generally defined as vitamins, minerals, herbs and extracts. They're regulated as a unique category of food by the Food and Drug Administration. iStockphoto.com hide caption

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Flemming Ornskov, CEO of Shire, says the company's offer for ViroPharma is part of a broader push into orphan drugs. Bloomberg via Getty Images hide caption

itoggle caption Bloomberg via Getty Images

Hydrocodone, sold as Vicodin and other brand names, may face tighter restrictions on prescribing and use. Toby Talbot/AP hide caption

itoggle caption Toby Talbot/AP

Jerky treats for dogs and cats have been linked to pet illnesses and deaths. But it's still unclear what is causing the problems. iStockphoto.com hide caption

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The FDA is expected to determine whether e-cigarettes should be regulated like tobacco products later this month. Jim Watson/AFP/Getty Images hide caption

itoggle caption Jim Watson/AFP/Getty Images

Drug overdose deaths have more than tripled in the U.S. since 1990. Opioid painkillers like OxyContin are the cause of three-quarters of those deaths. Toby Talbot/Associated Press hide caption

itoggle caption Toby Talbot/Associated Press

Joe Buley owns Screamin' Ridge Farm in Montpelier, Vt. He says the FDA's new food safety rules threaten the viability of small New England farm operations like his. Here, Buley harvests cucumbers. Emily Corwin hide caption

itoggle caption Emily Corwin

Acetaminophen has been added to the list of over-the-counter painkillers that can cause rare but deadly skin reactions. Paul Sancya/AP hide caption

itoggle caption Paul Sancya/AP

Don't get near that grill with the spray-on sunscreen. Lisa Thornberg/iStockphoto.com hide caption

itoggle caption Lisa Thornberg/iStockphoto.com

Bad bug: The bacterium Clostridium difficile kills 14,000 people in the United States each year. Janice Carr/CDC/dapd hide caption

itoggle caption Janice Carr/CDC/dapd

These funny mustachioed fish are at the center of a farm bill fight in the House and Senate. Sasha Radosavljevic/iStockphoto.com hide caption

itoggle caption Sasha Radosavljevic/iStockphoto.com