Drug Interaction Report

Estradiol and Betamethasone: Interaction Details

A pharmacist-reviewed analysis of the Estradiol and Betamethasone interaction: the documented clinical effects, severity rating, onset, mechanism, and management considerations, with cited references throughout.

AI-assisted, pharmacist-reviewed · Source data updated Aug 8, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature

Estradiol

Delestrogen
+

Betamethasone

Betavet Celestone Soluspan Del-Beta Diprolene Luxiq Sernivo
Dr. Brian Staiger, PharmD, BCPS
Medically reviewed by
Dr. Brian Staiger, PharmD, BCPS
Updated Aug 8, 2026
Editorial policy · Data sources
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Interaction severity
Major
Potentially serious — often needs a change or close monitoring.
How we grade severity & evidence

Severity levels

  • Contraindicated: These should generally not be used together.
  • Major: Potentially serious — often needs a change or close monitoring.
  • Moderate: Can be significant — usually manageable with monitoring.
  • Minor: Usually limited clinical impact.

Evidence grades

  • Established: Well documented — supported by controlled studies or strong clinical data.
  • Probable: Good supporting evidence, though not definitively proven.
  • Suspected: Some evidence suggests this interaction, but it is not well established.
  • Possible: Limited or conflicting evidence; the interaction may occur.
  • Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.

Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.

Of 216 documented Estradiol interactions, 170 are rated major — including this one.
Worried about symptoms right now? Contact your pharmacist or prescriber, or call Poison Control at 1-800-222-1222 (US). Call 911 for an emergency.
Onset
delayed
Evidence
probable
Severity
Major

What happens

Increased corticosteroid effects

Interaction Deep Dive

Combination oral contraceptives have been demonstrated to alter the pharmacokinetics of hydrocortisone and predniSONE, thereby potentially enhancing therapeutic effect. The half-lives of these steroids increase by 2 to 3 times and their clearance may decrease 2- to 5-fold345. Coadministration of COCs and corticosteroids may increase corticosteroid exposure. Exert caution when coadministered 21.

Why it happens (mechanism)

Inhibition of corticosteroid metabolism by the combination contraceptive

Literature reports

1 report — tap to read

a) Combination oral contraceptives have been demonstrated to alter the pharmacokinetics of hydrocortisone and predniSONE, thereby potentially enhancing therapeutic effect. The half-lives of these steroids increase by 2 to 3 times and their clearance may decrease 2- to 5-fold 345.

Common questions

Can I take Estradiol and Betamethasone together?

Increased corticosteroid effects Always confirm with your pharmacist or prescriber before making any change.

How serious is the Estradiol and Betamethasone interaction?

It is rated major. Potentially serious — often needs a change or close monitoring.

How quickly could this interaction happen?

The documented onset is "delayed". Effects tend to build up gradually over days to weeks.

How strong is the evidence for this interaction?

The evidence is graded "probable". Good supporting evidence, though not definitively proven.

From our Q&A

Real reader questions about these medications, each personally answered by our pharmacist:

Questions for your pharmacist

  • Does my dose of Estradiol or Betamethasone need adjusting while I take them together?
  • What symptoms should prompt me to call you or my prescriber right away?
  • Does the timing of my doses matter for this combination?
  • Is there a safer alternative to one of these medications for me?

References (5)

  1. Product Information: FEMLYV orally disintegrating tablets, norethindrone acetate, ethinyl estradiol orally disintegrating tablets. Millicent U.S. Inc (per FDA), East Hanover, NJ, 2024. DailyMed
  2. Product Information: ALESSE(R) 28 oral tablets, levonorgestrel ethinyl estradiol oral tablets. Cadence Health (per FDA), New York, NY, 2024.
  3. Baciewicz AM: Oral contraceptive drug interactions. Ther Drug Monit 1985; 7:26-35. DOI
  4. Legler UF & Benet LZ: Marked alterations in dose-dependent prednisolone kinetics in women taking oral contraceptives. Clin Pharmacol Ther 1986; 39:425-429. PubMed
  5. Frey BM, Schaad HJ, & Frey FJ: Pharmacokinetic interaction of contraceptive steroids with prednisone and prednisolone. Eur J Clin Pharmacol 1984; 26:505-511. PubMed
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Estradiol

Keep reading about Estradiol

All Estradiol interactions (216) Estradiol drug information
Also serious with: Ensitrelvir Tranexamic Acid Fezolinetant Penicillin V Potassium
Betamethasone

Keep reading about Betamethasone

All Betamethasone interactions (27) Betamethasone drug information
Also serious with: Desmopressin Nasal Levonorgestrel Intrauterine System Levofloxacin Injection Ofloxacin
Beyond drug–drug

These medications also interact with supplements

Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:

Estradiol + Activated Charcoal Grapefruit St. John's Wort Acacia Rigidula Adrafinil African Wild Potato Aletris Alfalfa + 205 more
Betamethasone + Activated Charcoal Lily-of-the-valley St. John's Wort Active Hexose Correlated Compound (ahcc) Alder Buckthorn Alfalfa American Ginseng Andrographis + 116 more

major · moderate · minor — check everything you take with our drug–supplement interaction checker.

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This information is for education, not a substitute for professional medical advice. Do not start, stop, or change any medication without talking to your pharmacist or prescriber.