Interaction Checker

Anastrozole interactions

Anastrozole (Arimidex), an aromatase inhibitor has 27 documented interactions across the FDA labels and fact sheets we index: 17 major, 0 moderate, 0 minor, and 10 where a label reports no significant interaction. Each entry below quotes the sentence behind it. This drug page is a starting point, not a verdict for your situation.

What Anastrozole looks like

All 9 versions
Anastrozole 1 mg tablet: white, round, 6 mm, imprinted Adx on one side and 1 on the other.
Adx / 1
1 mg · white · round · 6 mm
ANI
Anastrozole 1 mg tablet: white, round, 6 mm, imprinted A7.
A7
1 mg · white · round · 6 mm
BluePoint
Anastrozole 1 mg tablet: white, round, 6 mm, imprinted AN on one side and 1 on the other.
AN / 1
1 mg · white · round · 6 mm
Breckenridge
Anastrozole 1 mg tablet: white, round, 6 mm, imprinted YL on one side and 111 on the other.
YL / 111
1 mg · white · round · 6 mm
Yiling

Renderings from the FDA labels' product listings: color, shape, size, and imprint. 9 documented versions from 15 labelers.

Interactions from the label

Major interactions (17)

  • Conjugated estrogensestrogenMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Conjugated estrogens and bazedoxifeneestrogenMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Desogestrel and ethinyl estradioloral contraceptiveMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Drospirenone and ethinyl estradioloral contraceptiveMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Esterified estrogens and methyltestosteroneestrogenMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • EstradiolestrogenMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Estradiol and dienogestoral contraceptiveMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Estradiol and norethindroneestrogenMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Ethynodiol diacetate and ethinyl estradioloral contraceptiveMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Etonogestrel and ethinyl estradiolestrogenMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • FulvestrantestrogenMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Levonorgestrel and ethinyl estradioloral contraceptiveMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Norelgestromin and ethinyl estradiolestrogenMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Norethindrone and ethinyl estradioloral contraceptiveMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Norgestimate and ethinyl estradioloral contraceptiveMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Norgestrel and ethinyl estradioloral contraceptiveMajor

    Estrogen Estrogen-containing therapies should not be used with ARIMIDEX as they may diminish its pharmacological action. (Anastrozole label, Drug interactions)

  • Tamoxifenselective estrogen receptor modulatorMajor

    • Tamoxifen: Do not use in combination with ARIMIDEX. (Anastrozole label, Drug interactions)

No significant interaction reported (10)

  • ApixabananticoagulantNo interaction

    Warfarin In a study conducted in 16 male volunteers, anastrozole did not alter the exposure (as measured by C max and AUC) and anticoagulant activity (as measured by prothrombin time, activated partial thromboplastin time, and thrombin time) of both R- and S-warfarin. (Anastrozole label, Drug interactions)

  • ArgatrobananticoagulantNo interaction

    Warfarin In a study conducted in 16 male volunteers, anastrozole did not alter the exposure (as measured by C max and AUC) and anticoagulant activity (as measured by prothrombin time, activated partial thromboplastin time, and thrombin time) of both R- and S-warfarin. (Anastrozole label, Drug interactions)

  • BivalirudinanticoagulantNo interaction

    Warfarin In a study conducted in 16 male volunteers, anastrozole did not alter the exposure (as measured by C max and AUC) and anticoagulant activity (as measured by prothrombin time, activated partial thromboplastin time, and thrombin time) of both R- and S-warfarin. (Anastrozole label, Drug interactions)

  • DabigatrananticoagulantNo interaction

    Warfarin In a study conducted in 16 male volunteers, anastrozole did not alter the exposure (as measured by C max and AUC) and anticoagulant activity (as measured by prothrombin time, activated partial thromboplastin time, and thrombin time) of both R- and S-warfarin. (Anastrozole label, Drug interactions)

  • EdoxabananticoagulantNo interaction

    Warfarin In a study conducted in 16 male volunteers, anastrozole did not alter the exposure (as measured by C max and AUC) and anticoagulant activity (as measured by prothrombin time, activated partial thromboplastin time, and thrombin time) of both R- and S-warfarin. (Anastrozole label, Drug interactions)

  • EnoxaparinanticoagulantNo interaction

    Warfarin In a study conducted in 16 male volunteers, anastrozole did not alter the exposure (as measured by C max and AUC) and anticoagulant activity (as measured by prothrombin time, activated partial thromboplastin time, and thrombin time) of both R- and S-warfarin. (Anastrozole label, Drug interactions)

  • FondaparinuxanticoagulantNo interaction

    Warfarin In a study conducted in 16 male volunteers, anastrozole did not alter the exposure (as measured by C max and AUC) and anticoagulant activity (as measured by prothrombin time, activated partial thromboplastin time, and thrombin time) of both R- and S-warfarin. (Anastrozole label, Drug interactions)

  • HeparinanticoagulantNo interaction

    Warfarin In a study conducted in 16 male volunteers, anastrozole did not alter the exposure (as measured by C max and AUC) and anticoagulant activity (as measured by prothrombin time, activated partial thromboplastin time, and thrombin time) of both R- and S-warfarin. (Anastrozole label, Drug interactions)

  • RivaroxabananticoagulantNo interaction

    Warfarin In a study conducted in 16 male volunteers, anastrozole did not alter the exposure (as measured by C max and AUC) and anticoagulant activity (as measured by prothrombin time, activated partial thromboplastin time, and thrombin time) of both R- and S-warfarin. (Anastrozole label, Drug interactions)

  • WarfarinanticoagulantNo interaction

    Warfarin In a study conducted in 16 male volunteers, anastrozole did not alter the exposure (as measured by C max and AUC) and anticoagulant activity (as measured by prothrombin time, activated partial thromboplastin time, and thrombin time) of both R- and S-warfarin. (Anastrozole label, Drug interactions)

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Not medical advice. Severity reflects the label's wording, not your circumstances. A "major" flag can be routine under supervision and a "minor" one can matter at high doses. Ask a pharmacist.