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Definition of Estrogen-associated blood clots

Estrogen-associated blood clots: Blood clots are occasional but serious side effects of estrogen therapy. They are dose-related, that is, they occur more frequently with higher doses of estrogen.

Estrogen therapy preparations (all of which carry this risk) include:

  • esterified estrogens
  • esterified estrogens and methyltestosterone
  • estradiol
  • estrogens (conjugated) and medroxyprogesterone
  • estrogens conjugated

The brand names of the estrogen therapy preparations carrying this risk include:

  • CLIMARA (estradiol)
  • ESTRACE (estradiol)
  • ESTRADERM (estradiol)
  • ESTRATAB (esterified estrogens)
  • ESTRATEST (esterified estrogens and methyltestosterone \)
  • MENEST (esterified estrogens)
  • OGEN (estropipate)
  • PREMARIN (estrogens conjugated)
  • PREMPHASE (estrogens conjugated and medroxyprogesterone)
  • PREMPRO (estrogens conjugated and medroxyprogesterone)

Cigarette smokers on estrogen therapy are at a higher risk than non-smokers for blood clots. Therefore, patients requiring estrogen therapy are strongly encouraged to quit smoking.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=9243
Last Editorial Review: 8/28/2013

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