Reaction

Breast Cancer In Situ reporting signals

Last recalculated 2026-09-14T18:28:35.993900+00:00 · 1,271 reports · 12 co-occurring drugs

As of the last recalculation, Breast Cancer In Situ appears in 1,271 FAERS reports alongside 12 co-occurring drug terms. The strongest observed disproportionality signal is CONJUGATED ESTROGENS AND MEDROXYPROGESTERONE ACETATE (PRR 310.2).

Important: FAERS is a spontaneous, voluntary, unverified reporting system. PRR and ROR identify reporting patterns for investigation; they are not incidence rates and do not establish causation.
DrugCo-reportsPRRROR
Conjugated Estrogens And Medroxyprogesterone Acetate331310.2314.6
Medroxyprogesterone Acetate517285.8288.8
Conjugated Estrogens492224.9226.8
Estrogens, Conjugated494222.3224.1
Raloxifene Hydrochloride3439.239.2
Estradiol15533.333.4
Progesterone3324.224.3
Estradiol Gel 0.1%4818.018.1
Estradiol Transdermal4818.018.0
Interferon Beta-1A1019.29.2
Teriparatide365.45.4
Levonorgestrel403.33.3

Related reactions

Data source: openFDA FAERS. See the OpenPV methodology and limitations.