30/08/2026
We have been working on some patient information on how to use some of the common transdermal oestrogen hormone replacement therapy (HRT) preparations.
How much do the instructions differ between products? Quite a bit!
Here is what the SmPCs (Summary of Product Characteristics) of the preparations say for optimum product results - see below in chat for each product.
Sandrena gel
Sandrena should be rubbed gently on dry and clean skin. Apply the gel to your lower body or thighs. Apply the gel to a different side of your body each day. Spread the gel over an area 1–2 times the size of your hand. Allow the gel to dry for a few minutes. Do not wash the area where you have applied the gel for at least one hour.
https://www.medicines.org.uk/emc/product/1048/pil
Oestrogel
The gel dose should be dispensed and applied to clean, dry, intact areas of skin e.g. on the arms and shoulders, or inner thighs. A thin layer of the gel should be applied to the entire arm on the inside and outside from wrist to shoulder or inner thigh. The area of application should be as large as possible.
Oestrogel should not be applied on or near the breasts or on the vulval region. A frequent change in application sites is recommended. Washing the skin or contact with other skin products should be avoided until at least one hour after application of Oestrogel. Oestrogel must be allowed to dry for 5 minutes before covering the skin with clothing.
https://www.medicines.org.uk/emc/product/353/smpc
Evorel gel
The correct dose of gel should be dispensed and applied to clean, dry, intact areas of skin e.g. on the arms and shoulders, or inner thighs, preferably after washing in the morning or evening. The area of application should be at least 2 times the size of the hand. Evorel Gel should not be applied on or near the breasts or on the vulval region. A frequent change in application sites is recommended. It is not necessary to rub Evorel Gel in, however, it should be allowed to dry for 2 minutes before covering the skin with clothing. The site of application should not be washed for 60 minutes.
https://www.medicines.org.uk/emc/product/101998/smpc
Lenzetto spray
The container should be held upright and vertical for spraying. The daily dose is one metered-dose spray on the inner forearm. If two or three sprays are prescribed as the daily dose, they should be applied to adjacent non-overlapping (side-by-side) 20 cm2 areas on the inner surface of the arm between the elbow and the wrist and allowed to dry for approximately 2 minutes. The site of application should not be washed for 60 minutes.
https://www.medicines.org.uk/emc/product/11175/smpc
Evorel patches
Evorel should be applied to the skin as soon as it is removed from the wrapper. Recommended application sites are on clean, dry, healthy, intact skin and each application should be made to a slightly different area of skin on the trunk below waistline. Evorel should not be applied on or near the breasts.
Evorel should remain in place during bathing and showering. Should it fall off during bathing or showering the patient should wait until cutaneous vasodilation ceases before applying a replacement patch to avoid potential excessive absorption. Should a patch fall off at other times it should be replaced immediately. Patients can be advised to use baby oil to help remove any gum/glue which may remain on their skin after patch removal.
https://www.medicines.org.uk/emc/product/10927/smpc
Estradot patches
The adhesive side of Estradot should be placed on a clean, dry area of the abdomen. Estradot should not be applied to the breasts.
Estradot should be replaced twice weekly. The site of application must be rotated, with an interval of at least 1 week allowed between applications to a particular site. The area selected should not be oily, damaged, or irritated. The waistline should be avoided, since tight clothing may dislodge the patch. The patch should be applied immediately after opening the sachet and removing the protective liner. The patch should be pressed firmly in place with the palm of the hand for about 10 seconds, making sure there is good contact, especially around the edges.
In the event that a patch should fall off, the same patch may be reapplied. If necessary, a new patch may be applied.
https://www.medicines.org.uk/emc/product/7226/smpc