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    • HRT tablets increase...

    HRT tablets increase risk of blood clots but Skin patches, creams safe

    Written by Hina Zahid Published On 2019-01-09T20:28:43+05:30  |  Updated On 9 Jan 2019 8:28 PM IST
    HRT tablets increase risk of blood clots but Skin patches, creams safe

    According to a large study Hormone replacement therapy (HRT) tablets are associated with a higher risk of serious blood clots known as venous thromboembolism or VTE. Surprisingly no increased risk was found for HRT skin patches, gels or creams. The study has appeared in The BMJ today.


    Usually, a vast majority of women on HRT continue to be prescribed oral preparations. The researchers say these findings provide important information for women and their doctors to help them make the best treatment choices.


    HRT is used to relieve menopausal symptoms such as hot flushes and night sweats. Different treatments are available depending on the symptoms. For example, tablets containing oestrogen only or a combination of oestrogen and progestogen, as well as ‘transdermal’ treatments, such as patches, gels and creams.


    Thromboembolism is a rare but significant cause of morbidity and mortality in adults. Previous trials have shown increased risks of blood clots in menopausal women using HRT, but there is a lack of information on risks associated with different types of HRT.

    So Yana Vinogradova, a member of an epidemiological team at the University of Nottingham led by Julia Hippisley-Cox, set out to assess the association between VTE risk and all available types of HRT in the UK between 1998 and 2017.


    Using two UK primary care databases (QResearch and CPRD), they compared HRT prescription records of over 80,000 women aged 40-79 years who developed blood clots (cases) with those of over 390,000 women who did not (controls).


    Other relevant factors, such as lifestyle, family history of blood clots, and underlying conditions linked to blood clots were taken into account.


    Most HRT tablets were found to be associated with increased VTE risk (9 extra cases per 10,000 women per year) compared with no HRT.


    Tablets containing equine oestrogen, including single and combined preparations, were consistently associated with higher risks than tablets containing synthetic oestrogen.


    Higher doses of oestrogen were also associated with higher VTE risk. However, no increased VTE risk was found for skin patches, gels and creams.


    This is an observational study, and as such, can’t establish cause, and the researchers point to some limitations that may have influenced the results. Nevertheless, they say this study “has provided a more detailed picture of the VTE risks for different HRT preparations and can help clinicians and women make treatment choices.”


    They suggest greater consideration should be given to transdermal HRT, particularly for women already at an increased VTE risk and in line with recent guidelines.


    For more details click on the link: http://www.bmj.com/content/364/bmj.k4810
    blood clotscreamsgelshormone replacement therapyHRTHRT tabletsincrease riskmenopausal symptomssafeSkin patchesSo Yana VinogradovaThe BMJthromboembolismvenousvenous thromboembolismVTE
    Source : With inputs from BMJ

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    Hina Zahid
    Hina Zahid
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