Fulvestrant and Norethindrone interaction
Fulvestrant and Norethindrone: the Norethindrone prescribing label flags this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Norethindrone label · effective 2026-01-31
CONTRAINDICATIONS Progestin-only oral contraceptives (POPs) should not be used by women who currently have the following conditions: • Known or suspected pregnancy • Known or suspected carcinoma of the breast.
Norethindrone tablets do not contain estrogen and, therefore, this insert does not discuss the serious health risks that have been associated with the estrogen component of combined oral contraceptives (COCs).
The healthcare professional is referred to the prescribing information of combined oral contraceptives for a discussion of those risks.
The relationship between progestin-only oral contraceptives and these risks is not fully defined.
Irregular Genital Bleeding Irregular menstrual patterns are common among women using progestin-only oral contraceptives.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.