library.onepin.app/climara-estradiol-weekly-patch Peptide Education Library
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OnePin Peptide Library · Hormonal

Hormonal Hormone replacement therapy Prescription drug

Climara (Estradiol Weekly Patch)

Estradiol Patch (Climara)

Hormone replacement therapySteroid hormoneEstrogenOnce-weekly transdermal

Climara is a once-weekly transdermal estradiol patch delivering 17-beta-estradiol continuously over 7 days. Compared to twice-weekly patches, Climara offers fewer application events and smoother serum levels, but at the cost of a slightly larger patch size. Available strengths from 0.025 mg/day to 0.1 mg/day. Matrix construction - NOT cuttable. Same interaction profile, indications, and clinical considerations as twice-weekly estradiol patches.

Quick Start
Route
Transdermal Patch
Start low
0.05 mg/day patch (most common starting strength)
Frequency
Once weekly (change same day each week)
Timing
Anytime

Apply to clean dry skin on lower abdomen or buttocks. Rotate sites - avoid same site within 7 days.

❋

Start here. Every protocol below is ordered lowest-first. Begin at the smallest effective dose, hold about a week to assess tolerance, and step up only if needed.

Tiered Protocols · lowest first
Quick Start
Conservative start
0.05 mg/day patch (most common starting strength) · Transdermal Patch · Once weekly (change same day each week)
Lowest starting point. Hold about a week to assess tolerance before stepping up.
0.05 mg/day patch (most common starting strength)
Once weekly (change same day each week)
Standard
Female HRT
0.025-0.1 mg/day · Topical · Weekly
human clinical trial · FDA Climara label
0.025-0.1 mg/day
Weekly
◆
01

How it works

Identical to other estradiol preparations - ER-alpha and ER-beta agonism driving transcription at estrogen response elements. The difference is formulation: Climara's rate-controlling matrix sustains delivery for a full 7 days per application, reducing user burden from ~104 patch changes/year (twice-weekly) to 52.

Identical to other estradiol preparations - ER-alpha and ER-beta agonism driving transcription at estrogen response elements. The difference is formulation: Climara's rate-controlling matrix sustains delivery for a full 7 days per application, reducing user burden from ~104 patch changes/year (twice-weekly) to 52.

02

What to expect

Early
Days 1–7

1-2 weeks: vasomotor symptoms improve

03

Evidence

HumanModerate
AnimalPresent
In-vitroPresent
2002Effects of transdermal estradiol delivered by a matrix patch on bone density in hysterectomized, postmenopausal women: a 2-year placebo-controlled trial · Notelovitz M et al, Menopause ↗peer reviewed
2000Efficacy and tolerability of a new 7-day transdermal estradiol patch versus placebo in hysterectomized women with postmenopausal complaints · Erkkola R et al, Maturitas ↗peer reviewed
2009Transdermal hormone therapy in postmenopausal women: A review of metabolic effects and drug delivery technologies · Stuenkel CA et al, Drug Design, Development and Therapy ↗review
2010Transdermal menopausal hormone therapy: delivery through skin changes the rules · Goodman MP, Climacteric ↗review
04

Interactions & stacking

What's safe to combine, and what belongs in a separate pin.

Safe & synergistic

Thyroid replacementMonitor TSH for TBG-mediated dose changes.
Testosterone (low-dose female HRT)Standard female HRT pairing.
ProgesteroneEndometrial protection in women with a uterus - not optional.

Keep separate

Estradiol Transdermal Patch (twice-weekly)Same drug, different cadence - do not wear both simultaneously.
Combined hormonal contraceptivesDuplicate estrogen - thrombosis risk.
Anastrozole / LetrozoleAromatase inhibitors oppose estradiol replacement.
05

Side effects & safety

Commonly reported

  • Application site reaction (higher than twice-weekly due to longer wear)
  • Breast tenderness
  • Headache
  • Nausea

Less common & notes

  • Unscheduled bleeding
  • Mood changes
  • Melasma
06

Pharmacokinetics

Illustrative plasma concentration · 24 h
Half-life
~4 hours after patch removal
Peak · Tmax
Steady state by day 2-3
Elimination
Detectable 24-48 hours post-removal
Activity
7 days per patch (once-weekly cadence)

Storage. Store pouched patches at controlled room temperature. Apply immediately upon opening. Avoid hot tubs/saunas during wear.

07

Regulatory status

FDA-approved for menopausal symptoms and osteoporosis prevention. Prescription-only. Same black-box warnings as other systemic estrogens. Matrix construction - NOT cuttable per label.

Put it to work

Calculate, log & track

Open Climara (Estradiol Weekly Patch) straight into OnePin with your vial and dose pre-filled, then let it handle the syringe math and remind you before the vial runs out.

Open Climara (Estradiol Weekly Patch) in the app →

Go deeper

The guide & community

The complete Climara (Estradiol Weekly Patch) walkthrough, real protocol discussion and coaching live inside the BlessUp community on Skool.

Join the community ↗
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