Indole-3-carbinol - Estradiol Interaction Details

There are multiple interactions reported between these two agents.

Interaction Details

Estradiol is classified as belonging to the following category: Cytochrome P450 1A2 (Cyp1A2) Substrates

There is some evidence that indole-3-carbinol induces CYP1A2 isozymes. Theoretically, indole-3-carbinol might increase the metabolism of CYP1A2 substrates and lower serum concentrations. Some substrates of CYP1A2 include clozapine (Clozaril), cyclobenzaprine (Flexeril), fluvoxamine (Luvox), haloperidol (Haldol), imipramine (Tofranil), mexiletine (Mexitil), olanzapine (Zyprexa), pentazocine (Talwin), propranolol (Inderal), tacrine (Cognex), theophylline, zileuton (Zyflo), zolmitriptan (Zomig), and others.

Interaction Rating

Moderate

Likelihood of Occurrence

Possible

Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists

References

He YH, Friesen MD, Ruch RJ, Schut HA. Indole-3-carbinol as a chemopreventive agent in 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) carcinogenesis: inhibition of PhIP-DNA adduct formation, acceleration of PhIP metabolism, and induction of cytoch

Interaction Details

Estradiol is classified as belonging to the following category: Estrogens

There is some evidence that indole-3-carbinol has antiestrogenic activity. Theoretically, indole-3-carbinol might interfere with the effects of estrogen therapy.

Interaction Rating

Moderate

Likelihood of Occurrence

Possible

Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists

References

Bell MC, Crowley-Nowick P, Bradlow HL, et al. Placebo-controlled trial of indole-3-carbinol in the treatment of CIN. Gynecol Oncol 2000;78:123-9.
Kim, Y. S. and Milner, J. A. Targets for indole-3-carbinol in cancer prevention. J.Nutr.Biochem. 2005;16(2):65-73.
Anon. Indole-3-carbinol. Monograph. Alternative Medicine Review 2005;10(4):337-42.
McAlindon TE, Gulin J, Chen T, et al. Indole-3-carbinol in women with SLE: effect on estrogen metabolism and disease activity. Lupus 2001;10:779-83.

Estradiol Overview

Vaginal estrogen is used to treat vaginal dryness, itching, and burning; painful or difficult urination; and sudden need to urinate immediately in women who are experiencing or have experienced menopause (change of life; the end of monthly menstrual periods). Femring^® brand vaginal ring is also used to treat hot flushes ('hot flashes'; sudden strong feelings of heat and sweating) in women who are experiencing menopause. Premarin^® brand vaginal cream is also used to treat kraurosis vulvae (a condition that may cause vaginal dryness and discomfort in women or girls of any age). Imvexxy^® brand vaginal inserts are used for the treatment of dyspareunia (difficult or painful sexual intercourse) in menopausal women. Vaginal estrogen is in a class of medications called hormones. It works by replacing estrogen that is normally produced by the body.

See More Information Regarding Estrogen Vaginal

Indole-3-carbinol - More Interactions

Indole-3-carbinol interacts with 288 drugs

Interaction Rating Key

These severity listings are for informational use only. Never start, stop or otherwise change your therapy before speaking with your provider.

Major	The combined use of these agents is strongly discouraged as serious side effects or other negative outcomes could occur.
Moderate	Use cautiously under the care of a healthcare professional or avoid this combination. A significant interaction or negative outcome could occur.
Minor	Be aware that there is a chance of an interaction. Watch for warning signs of a potential interaction.
Unknown	No interactions have been reported or no interaction data is currently available.