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. 1963 Jul 13;185(2):131-2.

Oral contraception and venous thrombosis

E T Tyler
  • PMID: 12255487

Oral contraception and venous thrombosis

E T Tyler. JAMA. .

Abstract

PIP: Between 1961 and 1963 there were 347 instances of thrombophlebitis in women using a norethynodrel-estrogen combination (Enovid) for contraception reported to the manufacturer. Fatal pulmonary embolism occurred in 35 cases, of which 9 were due to causes other than Enovid. There is a serious lack of reliable statistics concerning the occurrence of thrombophlebitis or pulmonary embolism in the female population at various ages. A meeting of specialists in 1962 concluded that no evidence was available to relate spontaneous intravascular clotting with the use of oral contraceptives. Supporters of a simple contraceptive maintain that if Enovid is responsible for the problems noted, the incidence is extremely low and would probably be consistent with the rare-drug idiosyncrasy or sensitivity. There would be a greater health risk to those women who, through nonuse of any contraceptives (when they would have used the oral method), become pregnant and develop thromboembolism as a consequence of pregnancy.

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