The prescription painkiller sold under the brand-name Vicodin contains hydrocodone bitartrate and acetaminophen. To reduce the risk of liver damage, the Food and Drug Administration is moving to limit the amount of acetaminophen allowed in prescription medicines. Toby Talbot/AP hide caption

itoggle caption Toby Talbot/AP

Timothy Webb and other advocates protest the cost of HIV drugs manufactured by the pharmaceutical company Gilead outside an AIDS conference in Atlanta in March. Gilead is making a new hepatitis C drug, Sovaldi. John Amis/AP Images for AIDS Healthcare Foundation hide caption

itoggle caption John Amis/AP Images for AIDS Healthcare Foundation

Martine Rothblatt, CEO of United Therapeutics, is the namesake of the company's latest drug, Orenitram. Ron Levine/Getty Images hide caption

itoggle caption Ron Levine/Getty Images

Dr. Ernest Bagner III stands outside his former office tucked in the back corner of a strip mall in Hollywood, Calif., where he says he was the victim of Medicare fraud. Jonathan Alcorn/ProPublica hide caption

itoggle caption Jonathan Alcorn/ProPublica

British pharmaceuticals giant GlaxoSmithKline is pledging to revamp its relationships with doctors. Sang Tan/AP hide caption

itoggle caption Sang Tan/AP

Yes, you could do this at home. Growing bacteria you find in a pile of dirt or a local pond might reveal the next big antibiotic. Charlotte Raymond/Science Source hide caption

itoggle caption Charlotte Raymond/Science Source

A colorized closeup of the hepatitis C virus. James Cavallini/Science Source hide caption

itoggle caption James Cavallini/Science Source

In epilepsy, the normal behavior of brain neurons is disturbed. The drug valproic acid appears to help the brain replenish a key chemical, preventing seizures. David Mack/Science Source hide caption

itoggle caption David Mack/Science Source

The schizophrenia drug Risperdal was at the heart of government investigations into improper marketing that stretched back more than a decade. JB Reed/Bloomberg via Getty Images hide caption

itoggle caption JB Reed/Bloomberg via Getty Images

Scans from patients with fungal meningitis show evidence of a stroke (left) and arachnoiditis. New England Journal of Medicine hide caption

itoggle caption New England Journal of Medicine

What's in your neighbor's medicine cabinets may influence overdose risk in the community. iStockphoto.com hide caption

itoggle caption iStockphoto.com