Estraderm/ Evorel (
generic name: estradiol) is a
hormone replacement therapy used to alleviate
menopausal symptoms related to estrogen deficiency, such as
hot flushes,
insomnia,
urogenital changes,
mood disturbances, and
bone loss leading to osteoporosis. It belongs to the
pharmacological class of
estrogens, specifically
estradiol, and it functions by supplying a controlled daily dose of estrogen via a transdermal patch, helping to restore hormonal balance in
postmenopausal women. Estradiol’s mechanism of action involves
replacing diminishing endogenous estrogens, thereby mitigating menopausal symptoms and reducing bone resorption.
Dosage
Estraderm is administered via a
transdermal patch delivering
50 µg of estradiol per day, applied to the skin and changed
twice weekly. Patches are applied to a
hairless area below the waist, such as the
thigh or
buttock, and should be rotated to avoid using the same site repeatedly.
Users should replace patches on the
same two days each week (e.g., Monday and Thursday) to maintain consistent hormone delivery. If a patch
falls off, it must be replaced immediately with a new one while retaining the established patch-change schedule. If a patch is
missed, apply it as soon as possible and continue with the regular schedule; spotting or breakthrough bleeding may occur. In case of
overuse, symptoms of estrogen excess, such as
tender breasts,
nausea or vomiting,
unexpected bleeding, or
abdominal bloating, may occur; these are reversible upon removing the patch, and medical advice should be sought before resuming treatment
Storage
Estraderm patches should be stored
in the original package,
at temperatures not exceeding 25 °C/72 °F, away from moisture and heat sources. They must be
kept out of the reach of children, and not used after the
expiry date, which refers to the
last day of the indicated month.
Side Effects
This text is for informational purposes only. Please consult a doctor or pharmacist before using any medication.
The information leaflet that comes with the medication includes full information about the possible side effects. Be sure to read and understand these, and if there are any questions, discuss these with a healthcare provider or pharmacist before starting treatment.
Caution
If a sudden allergic reaction (anaphylaxis) occurs shortly after taking Estraderm, with symptoms like swelling of the face, tongue, or throat making it difficult to breathe or swallow, or there is wheezing, hives, rash, blistering, or peeling of the skin, call a doctor or emergency services right away, or go to an emergency room immediately.
Pregnant women should not be using Estraderm unless this has been discussed with a healthcare provider, as it might harm the unborn baby or pose a risk of miscarriage. For this reason, women planning to become pregnant should use appropriate birth control measures during the treatment and for one month after removing the last patch.
Estraderm may pass into breast milk, and mothers should consult with a doctor if already feeding or planning to feed an infant.
Most people who use Estraderm do not experience any adverse side effects. Doctors prescribe this medication because they assess the benefits of such treatment outweigh any likely unwanted effects.
Some of the side effects that have been reported include application site irritation or itching, breast pain or tenderness, rash, dizziness, headache, nausea, abdominal pain, diarrhea, joint pain, spotting or breakthrough bleeding, and weight gain. Less common effects may include vaginal thrush, wind, palpitations, breast fullness, painful periods, swelling of the hands or feet, fluid retention, muscle pain, allergic reactions, bloating, and gallstones.
Not all side effects are listed here. If these or other unlisted symptoms persist or worsen, consult a healthcare provider or pharmacist.
Estraderm is FDA‑approved for the treatment of symptoms associated with menopause or surgical removal of the ovaries (oophorectomy), in women who are not naturally producing adequate estrogen . These menopausal symptoms include:
- Hot flushes: sudden warmth, sweating, and flushing.
- Insomnia: difficulty initiating or maintaining sleep.
- Urogenital changes: vaginal dryness, discomfort during intercourse.
- Mood disturbances: mood swings, irritability, anxiety.
- Bone loss: increased risk of fractures due to osteoporosis.
Estraderm may also be used off‑label for osteoporosis prevention by addressing estrogen deficiency–related bone loss, helping to maintain bone density, though this use is not formally approved. In such cases, symptoms like fragile bones and height loss due to vertebral collapse may improve with estrogen supplementation.