HRT Patches Compared: Doses, Brands, and How to Find the Right Strength
Compare Evorel, Estradot, and Climara HRT patches by dose, delivery, and brand. Learn how to titrate and what each strength is typically used for.
How Oestrogen Patches Work and Why Dose Matters
Transdermal oestrogen patches deliver estradiol through the skin directly into the bloodstream, bypassing the liver entirely. This route of administration is safer in terms of blood clot risk compared to oral tablets, making patches a preferred choice for many women including those with a slightly elevated cardiovascular risk profile. The dose of a patch refers to the amount of estradiol released per 24 hours, measured in micrograms. Because absorption varies between individuals based on skin thickness, body temperature, application site, and hydration, the dose printed on the box is the nominal release rate rather than a guaranteed blood level. Two women using the same patch strength can achieve meaningfully different serum estradiol levels, which is why symptom response is more important than aiming for a specific patch number. Starting at a lower dose and adjusting based on symptom relief and tolerance over eight to twelve weeks is standard clinical practice.
Evorel Patches: Doses and Characteristics
Evorel is one of the most widely prescribed oestrogen-only patch brands in the UK, manufactured by Janssen. It comes in four strengths: 25 mcg, 50 mcg, 75 mcg, and 100 mcg, referring to the daily estradiol release rate. Evorel patches are changed twice weekly, typically every three to four days, and are worn on clean, dry skin below the waist, avoiding the breast area. The patch uses an adhesive matrix design, meaning the hormone is embedded within the adhesive layer rather than held in a gel reservoir, which generally means better adhesion and less skin irritation compared to older reservoir-style patches. Evorel 25 is often a starting dose for women with mild symptoms or those who are particularly sensitive to hormones. Evorel 50 is the most commonly prescribed starting dose for moderate symptoms. Evorel 75 and 100 are used when lower doses produce incomplete symptom relief after an adequate trial period of at least eight weeks. Combined patches (Evorel Conti and Evorel Sequi) also exist for women with a uterus who need progesterone included.
Estradot Patches: Doses and Characteristics
Estradot, manufactured by Novartis, is another matrix-style twice-weekly patch available in the UK. It comes in strengths of 25 mcg, 37.5 mcg, 50 mcg, 75 mcg, and 100 mcg. The additional 37.5 mcg option gives prescribers a smaller stepping stone between 25 and 50, which can be useful for women who find 25 mcg insufficient but feel 50 mcg is too stimulating in the early months. Estradot patches are notably smaller than Evorel at equivalent doses, which some women find more comfortable and discreet. The adhesive quality is generally considered good, though as with all patches, application to slightly cooler skin areas and pressing firmly for thirty seconds after application reduces the chance of partial detachment during exercise or bathing. Some women find Estradot produces fewer skin reactions than other brands, though individual responses vary considerably. Switching brands at the same nominal dose is sometimes recommended when a woman experiences persistent skin reactions to one manufacturer's adhesive formulation.
Climara Patches: Doses and Characteristics
Climara, manufactured by Bayer, is a once-weekly patch, which distinguishes it from both Evorel and Estradot. It comes in strengths of 25 mcg, 50 mcg, and 75 mcg. The once-weekly application schedule is a significant practical advantage for women who struggle to remember twice-weekly changes or who find frequent patch changes irritating to skin. The patch is larger than twice-weekly equivalents because it needs to contain enough estradiol for seven days rather than three to four. Some women find the larger size less comfortable under clothing, particularly in warmer months or during exercise. Climara's once-weekly delivery produces a steadier serum estradiol level across the week with less peak-to-trough fluctuation than twice-weekly patches. For women whose symptoms fluctuate noticeably in the days before a patch change, Climara is worth discussing as an alternative. Availability can be more variable than Evorel or Estradot depending on regional pharmacy stock.
Titrating Your Dose: When and How to Adjust
The standard clinical approach is to start at the lowest dose likely to be effective and review after eight to twelve weeks. If symptoms persist, the dose is increased one step at a time. Many women need several months and more than one dose adjustment before landing on the right level. The key symptoms that signal an inadequate dose include persistent hot flushes or night sweats, ongoing sleep disruption, low mood, joint aches, and cognitive fog that does not improve. Signs that a dose may be too high include breast tenderness, bloating, headaches, or mood swings that feel similar to premenstrual symptoms. These typically settle within a few weeks at a new dose but are worth reporting to your prescriber. Blood tests for serum estradiol can sometimes guide titration, particularly if there is doubt about whether the patch is absorbing properly, but most experienced menopause specialists titrate primarily by symptom response rather than serum levels alone. Application site rotation and ensuring skin is clean and free of moisturiser at the application point are practical steps to optimise absorption.
Practical Tips for Patch Use and Comparing Brands
Patches should be applied to an area of smooth skin, typically the upper outer buttock or lower abdomen, avoiding the waistband area where friction and movement can cause early detachment. Rotating the site with each change reduces local skin reactions. Showering or bathing before applying a new patch rather than just before removal allows skin to dry and settle properly. If a patch falls off within the first half of its wear cycle, replace it with a new one. If it falls off in the second half, apply a new patch and continue on the original change schedule. When comparing brands at the same nominal dose, remember that real-world delivery can differ slightly between manufacturers because of differences in adhesive matrices and film compositions. This means switching brands is effectively a small dose adjustment in practice. Women who are well controlled on one brand should generally stay with it if it remains available. Shortages, which have been a recurring issue in the UK, sometimes necessitate brand switches, in which case monitoring symptoms closely for four to six weeks is sensible before concluding a dose change is needed.
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