The diet drug Meridia is being withdrawn from the market because it can increase the risk of heart attacks and strokes.

Abbott Laboratories, the drug’s manufacturer, said on Friday that it was taking the action voluntarily but under pressure from the Food and Drug Administration.

“Meridia’s continued availability is not justified when you compare the very modest weight loss that people achieve on this drug to their risk of heart attack or stroke,” Dr. John Jenkins, director of the office of new drugs at the F.D.A., said in a statement.

F.D.A. officials said the estimated 100,000 Americans using Meridia should stop taking the drug and consult with their doctors.