Estriol General Information
Estriol is a female hormone. It is used by women to help reduce symptoms of menopause (such as hot flashes, vaginal dryness). These symptoms are caused by the body making less estrogen. If you are using Estriol to treat symptoms only in and around the vagina, products applied directly inside the vagina should be considered before medications that are taken by mouth, absorbed through the skin, or injected.
Certain estrogen products may also be used by women after menopause to prevent bone loss (osteoporosis). However, there are other medications (such as raloxifene, bisphosphonates including alendronate) that are also effective in preventing bone loss and may be safer. These medications should be considered for use before estrogen treatment.
Certain estrogen products may also be used by men and women to treat cancers (certain types of prostate cancer, breast cancer that has spread to other parts of the body) and by women who are not able to produce enough estrogen (for example, due to hypogonadism, primary ovarian failure).
How to Use Estriol
Read the Patient Information Leaflet if available from your pharmacist before you start using Estriol and each time you get a refill. If you have any questions, ask your doctor or pharmacist.
Take Estriol by mouth with or without food as directed by your doctor. You may take it with food or right after a meal to prevent stomach upset.
If you are taking the extended-release tablets, do not crush, chew, or dissolve them. Doing so can release all of the drug at once, increasing the risk of side effects. Also, do not split extended-release tablets unless they have a score line and your doctor or pharmacist tells you to do so. Swallow the whole or split tablet without crushing or chewing.
The dosage is based on your medical condition and response to treatment.
Take Estriol regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day as directed. Follow your dosing schedule carefully. Do not increase your dose or take Estriol more often or for a longer time than directed.
Tell your doctor if your condition does not improve or if it worsens.
Estriol Possible Side Effects
Stomach upset, nausea/vomiting, bloating, breast tenderness, headache, or weight changes may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Tell your doctor promptly if you see the tablet in your stool.
Remember that your doctor has prescribed Estriol because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using Estriol do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: mental/mood changes (such as depression, memory loss), breast lumps, unusual vaginal bleeding (such as spotting, breakthrough bleeding, prolonged/recurrent bleeding), increased or new vaginal irritation/itching/odor/discharge, severe stomach/abdominal pain, persistent nausea/vomiting, yellowing eyes/skin, dark urine, swelling hands/ankles/feet, increased thirst/urination.
Estriol may rarely cause serious problems from blood clots (such as heart attacks, strokes, deep vein thrombosis, pulmonary embolism). Get medical help right away if you have any serious side effects, including: chest/jaw/left arm pain, unusual sweating, sudden/severe headache, weakness on one side of the body, confusion, slurred speech, sudden vision changes (such as partial/complete blindness), pain/redness/swelling of legs, tingling/weakness/numbness in the arms/legs, trouble breathing, coughing up blood, sudden dizziness/fainting.
A very serious allergic reaction to Estriol is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
Before taking Estriol, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. Estriol may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using Estriol, tell your doctor or pharmacist your medical history, especially of: vaginal bleeding of unknown cause, certain cancers (such as breast cancer, cancer of the uterus/ovaries), blood clots, stroke, heart disease (such as heart attack), liver disease, kidney disease, family medical history (especially breast lumps, cancer, blood clots, angioedema), blood clotting disorders (such as protein C or protein S deficiency), high blood pressure, diabetes, high cholesterol/triglyceride levels, obesity, lupus, underactive thyroid (hypothyroidism), mineral imbalance (low or high level of calcium in the blood), a certain hormone problem (hypoparathyroidism), uterus problems (such as fibroids, endometriosis), gallbladder disease, asthma, seizures, migraine headaches, a certain blood disorder (porphyria), mental/mood disorders (such as dementia, depression).
Do not smoke or use tobacco. Estrogens combined with smoking further increases your risk of stroke, blood clots, high blood pressure, and heart attack, especially in women older than 35.
Tell your doctor if you just had or will be having surgery, or if you will be confined to a chair or bed for a long time (such as a long plane flight). These conditions increase your risk of getting blood clots, especially if you are taking an estrogen product. You may need to stop Estriol for a time or take special precautions.
Estriol may cause blotchy, dark areas of the skin on the face (melasma). Sunlight may worsen this effect. Avoid prolonged sun exposure, tanning booths, and sunlamps. Use a sunscreen and wear protective clothing when outdoors.
If you are nearsighted or wear contact lenses, you may develop vision problems or trouble wearing your contact lenses. Contact your eye doctor if these problems occur.
Children may be more sensitive to the side effects of Estriol. It may affect their growth/development. Discuss the possible effects of Estriol with the doctor, and monitor your child's growth periodically.
Estriol must not be used during pregnancy. If you become pregnant or think you may be pregnant, tell your doctor immediately.
Estriol passes into breast milk. It may reduce the quality and amount of breast milk produced. Consult your doctor before breast-feeding.
Estriol Possible Intercations
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Some products that may interact with Estriol include: aromatase inhibitors (such as anastrozole, exemestane, letrozole), fulvestrant, ospemifene, raloxifene, tamoxifen, toremifene, tranexamic acid.
Estriol may interfere with certain laboratory tests (including metyrapone test), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use Estriol.
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