Pharmaceuticals/Chemicals
Estradiol Valerate
Also called E2V · Progynon
Estradiol valerate injections are used for estrogen replacement and feminizing hormone care. Readers usually want a manageable injection routine and fewer swings between doses. The amount, interval and reason for treatment matter more than chasing a high peak.
Dosage & duration
Separate feminizing-care and menopause examples, with route and starting-dose scope retained.
UCSF · feminizing-care starting examples
Published example · product-specific- Dose
- 2 mg per week (low initial) or 4 mg per week (initial)
- How often
- Weekly injection; guideline includes IM and under-skin routes
- How long
- Ongoing individualized hormone care
These are starting examples from a provider guideline, not an automatic escalation target. The commercial label specifies IM use.
Sources: 2
Delestrogen · menopause label
Product label- Dose
- 10–20 mg per injection
- How often
- Into muscle every 4 weeks
- How long
- Periodic reassessment based on symptoms
A different indication and schedule from feminizing care; do not mix the two examples.
Sources: 1
The practical difference
Amount is not volume
Injections offer an alternative to daily estrogen; compare amounts using the actual vial concentration.
| What to compare | Milligrams (mg) | Millilitres (mL) |
|---|---|---|
| What it measures | Amount of estradiol valerate | Volume in the syringe |
| A different vial strength | Check the prescribed drug amount | The volume for that amount changes |
Why choose an injection?
Estradiol injections can remove the need to remember a daily tablet or gel. In feminizing care the aim is desired physical changes and hormone management, not simply the largest number on a blood test. Convenience needs to be balanced with how the person feels throughout the injection interval.
Why vial strength causes mistakes
A prescription in milligrams describes an amount of drug. A syringe in millilitres describes volume. Changing from one vial concentration to another changes the volume for the same prescribed milligrams. Check the actual vial rather than copying someone else’s syringe number.
Valerate versus cypionate
Both provide estradiol, but the formulation and release pattern differ. Keep the ester and prescribed interval with any comparison. If symptoms repeatedly change before the next injection, consistently timed tests and a symptom record are more useful than choosing a new dose from a chart.
The wider treatment plan
Clotting history, migraines and other health factors influence the appropriate route and follow-up. Where a uterus is present, the plan also needs to address womb-lining protection. The approximate curve helps explain overlap; it does not replace that assessment.
Model details: Estradiol Valerate · relative timing
Compare timing and buildup for this compound. The values are not blood concentrations or a measure of strength.
Shows a relative timing scenario; absolute blood concentrations are not calibrated.
Timing assumptions and sources
Approximate Oriowo human IM peak; legacy 84 h half-life remains an assumption, not proven by the label. The retained 84 h slower timescale is an assumption.
One 1 mg input peaks at 1 relative unit after a single dose. Other amounts scale proportionally; overlapping doses add when accumulation is on. Different compounds use separate relative scales.
- Timing half-life used
- 84 hours
- Absorption half-life assumed
- 16.38573 hours
- Reference amount for the relative scale
- 1 mg
- The faster rate is inferred to match the 48 h source-scoped peak time; absorption half-life 16.385732568003874 h is a mathematical shape parameter, not separately measured.
- A single 1-unit input has a peak of 1 relative unit; scaling and repeated-dose addition are mathematical assumptions. This normalization is independent of the example dose.
- Do not adopt the commonly repeated 667 pg/mL total peak as an exogenous per-dose peak without baseline handling.
- Oral estradiol valerate and IM valerate are different routes.
- Oriowo et al 1980: three estradiol esters
Single 5 mg IM in 1 m L arachis oil; cypionate peakabout 4 days, valerateabout 2 days; groups 10/9/10 women.
- Delestrogen label
IM estradiol-valerate oil product; does not provide a standalone baseline-corrected fitted curve.
estradiol-valerate-relative-timing-2026-10 · version 1
Common questions
Does a higher estradiol peak produce better feminization?
Higher levels are not a dependable shortcut to better results. Treatment goals, time, response and safety monitoring all matter.
Can I use my cypionate syringe volume for valerate?
Do not assume that. Vial concentrations and the prescribed amount may differ; confirm the milligram amount and corresponding volume for the new product.
Why do some bodybuilders talk about an estrogen base?
Some people report adding estradiol while using other PEDs because they suspect low estrogen is affecting how they feel. These reports involve several drugs changing together, so they do not show that estradiol improves gains or makes a cycle safer. Menopause and feminizing-care schedules are not bodybuilding add-on instructions.
Sources Labels, studies and notes behind this guide
Catalog evidence: Other human research. This describes the type of evidence, not a clinical review of every claim.
Summary and fact source checks: 2026-10-07. This records source checking, not medical review of the whole page.
Notes on the quick facts
- Main appeal
- An injection schedule can be easier for some people to maintain.
- Watch the units
- Valerate vials come in different concentrations.
- Results over time
- A larger peak does not establish faster or better feminization.
- 1. Delestrogen — US prescribing information
IM estradiol valerate; menopause label usual 10–20 mg every four weeks. Different vial concentrations; product-specific safety and indication.
- 2. UCSF — feminizing hormone therapy guideline
Direct table checked: valerate initial-low 2 mg/week and initial 4 mg/week IM/SC. Does not say 3–5 mg as some secondary summaries suggest. Maximum is not a target.
- 3. Oriowo et al 1980: three estradiol esters
Single 5 mg IM in 1 m L arachis oil; cypionate peakabout 4 days, valerateabout 2 days; groups 10/9/10 women.
- 4. Delestrogen label
IM estradiol-valerate oil product; does not provide a standalone baseline-corrected fitted curve.
- 5. Two estradiol valerate depot formulations: human PK study
Abstract: single 10 mg IM formulation comparison in healthy postmenopausal volunteers; not oral or subcutaneous bioequivalence.
- 6. Injectable estradiol dosing in transgender and nonbinary adults, 2025
Original clinical cohort; dose, blood-draw timing and achieved hormone concentrations. Does not establish an interchangeable dose for every ester/route.
Related compounds and examples
Related compounds
Estradiol Topical (EstroGel)
Estradiol gel is used to ease menopausal hot flushes and other low-estrogen symptoms without a pill or injection. The practical choices are the exact pump product, the daily skin routine and whether a separate progestogen is needed.
Estradiol Cypionate
Estradiol cypionate provides estrogen through an injection rather than a daily pill or gel. It is used for low-estrogen symptoms and in feminizing hormone care; the reason for treatment determines the dose and schedule.
Progesterone (Oral)
Oral micronized progesterone is often paired with estrogen to protect the womb lining. People also ask about sleep because it can cause drowsiness and has been studied for menopausal symptoms. Those are different reasons for treatment, with different schedules.