Researchers at Medco Health Solutions Inc. studied an estimated 1,300 women and found that women who were taking antidepressants such as Paxil, Prozac or Zoloft along with tamoxifen for at least one year had a breast-cancer recurrence rate of 16 percent. Women who were not taking the drugs reported a 7.5 percent recurrence rate. Antidepressants such as Celexa, Lexapro and Luvox appeared not to have an increased cancer recurrence rate.

Tamoxifen is a commonly used treatment for estrogen-dependent breast cancer, one of the most common types of breast cancer and one that has been associated with the use of hormone replacement therapy, HRT.

“If we lower the effectiveness of tamoxifen, you’d get worse outcomes.” Says Dr. Julie Gralow, an associate professor in oncology at the University of Washington School. She says many doctors in the U.S. also prescribe aromatase inhibitors rather than tamoxifen to block estrogen in post-menopausal women to prevent breast cancer from returning, which also avoids the tamoxifen-antidepressant interaction.

An estimated 30 percent of the half million American women taking tamoxifen have also been prescribed antidepressants. Medco says it has found that some doctors who treat breast cancer patients are not aware of the increased recurrence risk for breast cancer patients taking tamoxifen and antidepressants.

Source: The Wall Street Journal

SOURCE: Hormone Replacement Therapy › Tamoxifen with antidepressants may raise risk of breast cancer recurrence

Researchers found that women who took the breast cancer drugs were 30 percent less likely to have their cancer return over the next nine years. The drugs essentially starve potential cancers of estrogen, which can cause menopause-like symptoms in the women who take them. While the side effects may be discouraging, they may also be showing how well the treatment is working.

Researchers looked at 4,000 post-menopausal women who took AstraZeneca’s Arimidex, also known as anastrozole, or tamoxifen. Arimidex can only be taken by women who already have gone through menopause. The study showed that women who reported the menopause-like side effects within three months of treatment were more likely to remain cancer free.

Breast cancer is one of the most common forms of cancer among women, and the second most common cause of cancer death among women. According to Breast Cancer: Network of Strength, female breast cancer incidence rates continuously increased for two decades, but have leveled off since 2001. The organization theorizes that one possible explanation for the decrease is that millions of women stopped taking hormone replacement therapy (HRT) following the Women’s Health Initiative of 2002, which indicates a positive link between taking HRT and developing breast cancer.

SOURCE: Hormone Replacement Therapy › Hot flashes, sweats from anti-cancer drugs may be good sign