Can I take Estradot and Hormone replacement together?
Drug interaction guide
Originally published 25 Jan 2026
Meets Patient’s editorial guidelines
- DownloadDownload
- Share
- Language
- Discussion
- Audio Version
- Add to preferred sources on Google
Estradot is a brand name for a type of Hormone Replacement Therapy (HRT) containing oestradiol. Taking Estradot alongside other HRT medications that contain oestrogen is essentially taking a double dose of the same medication. This can lead to an overdose of oestrogen, causing side effects like breast tenderness, nausea, headaches, and an increased risk of blood clots.
Why this happens
Estradot and other oestrogen-based HRT products have 'additive' effects. Because they contain the same or similar active ingredients, using them together increases the total amount of hormone in your bloodstream beyond the recommended therapeutic level.
What you should do
Do not use Estradot with any other oestrogen-containing HRT unless specifically instructed by a specialist. If you are already using an HRT patch, gel, or tablet, speak to your doctor or pharmacist before starting Estradot to ensure you are not duplicating your treatment.
Important precautions
History of blood clots (VTE) or breast cancer
You must not use this treatment if you have ever had a blood clot in a vein (thrombosis), a pulmonary embolism, or if you have ever had breast cancer, as HRT can significantly increase the risk of these conditions recurring.
Intact uterus (womb)
If you still have your womb, using Estradot (oestrogen) alone increases the risk of cancer of the womb lining. You must also take a progestogen medicine to protect your womb lining unless you have had a hysterectomy.
Application site selection
Never apply the patch on or near the breasts. It should only be applied to the lower body (usually the buttocks or hips) to avoid increasing the risk of breast-related complications.
Food and drink warnings
Grapefruit juice
Grapefruit juice can interfere with the enzymes that break down oestrogen in your body. This may lead to higher levels of the hormone in your bloodstream, potentially increasing the risk of side effects like breast tenderness, nausea, or bloating. While a small amount is unlikely to cause harm, it is best to avoid consuming large quantities.
Alcohol
Drinking alcohol while using HRT can cause a temporary spike in your oestrogen levels. Long-term, heavy alcohol consumption combined with HRT may also slightly increase the risk of breast cancer compared to HRT use alone. It is advisable to stay within the recommended UK low-risk drinking guidelines (no more than 14 units per week).
Using other medicines
Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Disclaimer
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
Patient picks for Drug interactions

Drug interactions checker
Can I take Maitake and Turkey tail together?
There are no known harmful interactions between maitake and turkey tail mushrooms. Both are medicinal fungi that are often taken together to support the immune system. However, because both can stimulate the immune system, there is a theoretical possibility of an additive effect.

Drug interactions checker
Can I take Mounjaro and Metformin together?
When taken together, Mounjaro and Metformin can increase the risk of your blood sugar levels dropping too low (hypoglycaemia). While both drugs work to lower blood sugar, they do so in different ways, which can sometimes lead to an additive effect. Additionally, Mounjaro slows down how quickly your stomach empties, which might slightly change how your body absorbs Metformin, though this is usually not a major concern.
Article history
The information on this page is written and peer reviewed by qualified clinicians.
Article also available in English, German, Spanish, French, Italian, Portuguese, Hindi, Hebrew, Arabic, and Swedish.
25 Jan 2026 | Originally published
Join the conversation
Share your thoughts or experiences with others in our patient communities.

Ask, share, connect.
Browse discussions, ask questions, and share experiences across hundreds of health topics.

Feeling unwell?
Assess your symptoms online for free
Sign up to the Patient newsletter
Your weekly dose of clear, trustworthy health advice - written to help you feel informed, confident and in control.
By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.
More in drug interactions checker
- Can I take Amlodipine and Lansoprazole together?
- Can I take Anastrozole and Omeprazole together?
- Can I take Atenolol and Co-amoxiclav together?
- Can I take Black garlic and Rosehip together?
- Can I take Carbimazole and Collagen together?
- Can I take Cod liver oil and Garlic supplements together?
- Can I take Devil's claw and Rosehip together?
- Can I take Digoxin and Liquorice together?
- Can I take Empagliflozin and Losartan together?
- Can I take Evening primrose oil and Rosehip together?
- Can I take Fibre supplements and Losartan together?
- Can I take Glibenclamide and Empagliflozin together?
- Can I take Hydrochlorothiazide and Alogliptin together?
- Can I take Hydroxocobalamin and Stexerol D3 together?
- Can I take Hydroxocobalamin and Sukkarto together?
- Can I take Lactulose and Paracetamol together?
- Can I take Magnesium and Vitamin B2 together?
- Can I take Pancreatin and Lixiana together?
- Can I take Sertraline and Ibuprofen together?
- Can I take Sildenafil and Bisoprolol together?