Women who want to use hormone replacement therapy may be less likely to have a stroke if they use low-dose patches instead of pills, Canadian researchers reported
Sales of US market leader Wyeth's combined oestrogen-progestin therapy Prempro have fallen by about 50 percent since 2001 to around $1 billion a year. Wyeth is now owned by Pfizer.
But many experts who studied HRT said there was some evidence that if women took a lower dose and if they took HRT by means other than a pill, the risks might not be as high.
How the study was done