Wednesday, August 26, 2009

Long-term Tamoxifen Use Linked To Second Breast Cancer

{Tamoxifen 3D - photo left}
Long-term tamoxifen use linked to second breast cancer:
From The Canadian Press, “A new study suggests long-term use of tamoxifen is linked to an increased risk of a second type of breast cancer…another rare subtype of the disease increased by more than 400 per cent.”

Adjuvant Hormonal Therapy for Breast Cancer and Risk of Hormone Receptor–Specific Subtypes of Contralateral Breast Cancer

From Cancer Res 2009;69(17):6865–70, “Compared with the breast cancer risk women in the general population have, breast cancer survivors have a substantially higher risk of developing a second primary contralateral breast cancer. Adjuvant hormonal therapy reduces this risk, but preliminary data indicate that it may also increase risk of hormone receptor–negative contralateral tumors…Compared with women not treated with hormonal therapy, users of adjuvant tamoxifen for 5 years had a reduced risk of ER+ contralateral breast cancer [odds ratio, 0.4; 95% confidence interval (CI), 0.3–0.7], but a 4.4-fold (95% CI, 1.03–19.0) increased risk of ER- contralateral breast cancer. Tamoxifen use for <5>

From U.S. News (HealthBuzz):
“The study's lead author (Dr. Christopher Li ) told HealthDay News he does not think women should be afraid to take the drug, stating that its benefits outweigh its risks. Tamoxifen is customarily given only for five years because there's no evidence that longer-term use has additional benefits.”


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About Onco-PRN

Welcome and thanks for visiting Onco-P.R.N. - The oncology website with a focus on all things oncology pharmacy/pain/palliative care-related. It is intended to be an information resource for those pharmacist and relevant health care professionals involved in whatever fashion with cancer and palliative care. Stay tuned for the latest and greatest links and information with respect to: oncology medications, continuing education, pharmaceutical care initiatives, pain and symptom control, supportive care topics, and whatever else that might fit into the theme.

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Pharmacy History

"The earliest known compilation of medicinal substances was ARIANA the Sushruta Samhita, an Indian Ayurvedic treatise attributed to Sushruta in the 6th century BC. However, the earliest text as preserved dates to the 3rd or 4th century AD.
Many Sumerian (late 6th millennium BC - early 2nd millennium BC) cuneiform clay tablets record prescriptions for medicine.[3]

Ancient Egyptian pharmacological knowledge was recorded in various papyri such as the Ebers Papyrus of 1550 BC, and the Edwin Smith Papyrus of the 16th century BC.

The earliest known Chinese manual on materia medica is the Shennong Bencao Jing (The Divine Farmer's Herb-Root Classic), dating back to the 1st century AD. It was compiled during the Han dynasty and was attributed to the mythical Shennong. Earlier literature included lists of prescriptions for specific ailments, exemplified by a manuscript "Recipes for 52 Ailments", found in the Mawangdui tomb, sealed in 168 BC. Further details on Chinese pharmacy can be found in the Pharmacy in China article."

From Wikipedia:

Journal of Palliative Medicine - Table of Contents

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