Library

Estradiol

Estradiol is used in two primary contexts: (1) Menopausal hormone replacement therapy for cisgender women at lower doses (0.5-2mg oral), and (2) Gender-affirming feminizing hormone therapy for transgender women at moderate-to-high doses (4-8mg+ oral, or 4-10mg weekly injectable monotherapy). For menopausal use, prescribe at the lowest effective dose for shortest duration necessary. When prescribed to individuals with an intact uterus, progestin co-administration reduces endometrial hyperplasia risk. For gender-affirming care, adequate testosterone suppression is the primary goal; many require 6-8mg oral or injectable monotherapy. Contraindicated in estrogen-dependent tumors, active thromboembolic disorders, undiagnosed vaginal bleeding, and pregnancy.

Estradiol molecular structure
Estradiol molecular structure diagram from the DrugsPRO substance library.

Also known as: E2, Oestradiol, Β-estradiol, 17β-estradiol, Estrogen therapy, Estradiol-17β, Cis-Estradiol, Estradiol Cypionate

Classification

  • Chemical: Medicine
  • Tag: Estrogenic steroid
  • Tag: Gender-affirming
  • Tag: Hormone
  • Tag: Hormone Modulator
  • Tag: Pharmaceutical

Effects

  • Relief Of Vasomotor Symptoms
  • Breast Development And Tenderness
  • Feminization Of Fat Distribution
  • Fluid Retention
  • Nausea
  • Headache
  • Mood Changes
  • Mood Stabilization
  • Elevated Aggressiondrive
  • Anxiety
  • Libido Swings
  • Brain Fog
  • Softening Of Skin
  • Cognitive Dysphoria
  • Dulled Perception

Routes of Administration

Oral (Menopause / HRT)

Dosage

  • Threshold: 0.5 mg
  • Light: 0.5-1 mg
  • Common: 1-2 mg
  • Strong: 2-4 mg
  • Heavy: 4 mg

Duration

No data available for this section yet.

Oral (Gender-Affirming)

Dosage

  • Threshold: 2 mg
  • Light: 2-4 mg
  • Common: 4-6 mg
  • Strong: 6-8 mg
  • Heavy: 8 mg

Duration

No data available for this section yet.

Sublingual / Buccal (Gender-Affirming)

Dosage

  • Threshold: 2 mg
  • Light: 2-3 mg
  • Common: 3-6 mg (divided 3 x daily)
  • Strong: 6-9 mg (divided 3 x daily)
  • Heavy: 9 mg

Duration

No data available for this section yet.

Transdermal (Menopause / HRT)

Dosage

  • Threshold: 0.025 mg
  • Light: 0.025-0.05 mg
  • Common: 0.05-0.1 mg
  • Strong: 0.1-0.2 mg
  • Heavy: 0.2 mg

Duration

No data available for this section yet.

Transdermal (Gender-Affirming)

Dosage

  • Threshold: 0.05 mg
  • Light: 0.05-0.1 mg
  • Common: 0.1-0.2 mg
  • Strong: 0.2-0.3 mg
  • Heavy: 0.3-0.4 mg

Duration

No data available for this section yet.

Intramuscular (Menopause / HRT)

Dosage

  • Threshold: 2 mg
  • Light: 2-5 mg
  • Common: 5-10 mg (every 2-4 weeks)
  • Strong: 10-20 mg (every 2-4 weeks)
  • Heavy: 20 mg

Duration

No data available for this section yet.

Intramuscular / Subcutaneous (Gender-Affirming Monotherapy)

Dosage

  • Threshold: 2 mg
  • Light: 3-4 mg (weekly)
  • Common: 4-6 mg (weekly)
  • Strong: 6-8 mg (weekly)
  • Heavy: 8-10 mg (weekly)

Duration

No data available for this section yet.

Oral

Dosage

  • Heavy: 4+ mg
  • Light: 0.5-1 mg
  • Common: 1-2 mg
  • Strong: 2-4 mg
  • Threshold: 0.5 mg

Duration

  • Onset: 1-2 h
  • Comeup: 2-4 h
  • Peak: 4-6 h
  • Offset: 12-24 h
  • After Effects: 0-6 h
  • Total Duration: 12-24 h

Sublingual / Buccal

Dosage

No data available for this section yet.

Duration

  • Onset: 0.25-0.5 h
  • Comeup: 0.5-1 h
  • Peak: 1-2 h
  • Offset: 4-8 h

Transdermal

Dosage

  • Heavy: 200+ mcg/day
  • Light: 25-50 mcg/day
  • Common: 50-100 mcg/day
  • Strong: 100-200 mcg/day
  • Threshold: 25 mcg/day

Duration

  • Onset: 4-12 h
  • Comeup: 12-24 h
  • Peak: 24-48 h
  • Offset: 24-72 h
  • After Effects: 0-12 h
  • Total Duration: 24-72 h

Intramuscular (Weekly)

Dosage

No data available for this section yet.

Duration

  • Onset: 24-48 h
  • Comeup: 48-72 h
  • Peak: 48-96 h
  • Offset: 120-240 h

Intramuscular (Biweekly / Monthly)

Dosage

No data available for this section yet.

Duration

  • Onset: 24-48 h
  • Comeup: 48-96 h
  • Peak: 72-168 h
  • Offset: 2-4 h

Intramuscular

Dosage

  • Heavy: 20+ mg
  • Light: 2-5 mg
  • Common: 5-10 mg
  • Strong: 10-20 mg
  • Threshold: 2 mg

Duration

  • Onset: 1-2 h
  • Peak: 2-7 h
  • Offset: 7-28 h
  • After Effects: 0-3 h
  • Total Duration: 7-28 h

Harm Reduction

Check interactions before mixing substances, pay attention to dose spacing and hydration, and treat all dosage guidance as approximate rather than guaranteed safe.

Sources

Substance data is aggregated from the following public harm-reduction and reference sources.

Links

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Estradiol - Guide des substances DrugsPRO

Estradiol: Estradiol is used in two primary contexts: (1) Menopausal hormone replacement therapy for cisgender women at lower doses (0.5-2mg oral), and (2) Gender-affirming feminizing hormone therapy for transgender women at moderate-to-high doses (4-8mg+ oral, or 4-10mg weekly injectable monotherap

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