A promising Alzheimer's disease drug Pfizer Inc. and a partner are developing failed to work in a late-stage study, a startling disappointment after the potential blockbuster kept symptoms from worsening for a year in a prior test. Pfizer and partner Medivation Inc. said Wednesday ...

NEW YORK (Reuters Health) - People who have had an attack of shingles involving the eyes may have a heightened risk of stroke for a year afterward, a study published Wednesday suggests. Shingles is a painful condition caused by a reactivation of the virus that causes chickenpox, known as varicella-zoster virus. Once a person has had chickenpox, the virus goes into ...

DRUG DISAPPOINTMENT: After strong results in a midstage study, an Alzheimer's drug Pfizer Inc. is developing with a partner unexpectedly failed to work in a late-stage patient test. WHAT'S NEXT: Scientists at Pfizer and Medivation Inc. will analyze the data to try ...

Shares of Medivation Inc. plunged Wednesday after the failure of Dimebon, an Alzheimer's drug the company is developing with Pfizer Inc. Medivation stock lost about two-thirds of its value and fell to an annual low Wednesday morning. Before the market opened, Medivation and Pfizer said ...