tamoxifen
Used for Cancer
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Manufactured by various FDA-approved generic manufacturers.
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tamoxifen Uses, Side Effects, Interactions, Warnings & Dosing
What dosages is tamoxifen available in?
tamoxifen is available as a 10 mg and 20 mg oral tablet.
What is tamoxifen used for?
tamoxifen is a selective estrogen receptor modulator (SERM) that is used for:
- Metastatic HR+ breast cancer
- Early stage HR+ breast cancer after surgery to reduce the risk of breast cancer coming back
- Ductal carcinoma in situ (DCIS) in women after breast surgery and radiation to reduce the risk of breast cancer coming back
- Lowering the risk of getting breast cancer in women who are considered high risk
How does tamoxifen work?
tamoxifen is a selective estrogen receptor modulator (SERM). Some breast cancers rely on hormones like estrogen to grow. These breast cancers are called hormone receptor-positive (HR+). Tamoxifen works to treat HR+ breast cancer by blocking estrogen from working on breast tissue. By blocking estrogen, cancer cells don’t have the fuel they need to grow, which stops breast cancer from growing and spreading.
How do I take tamoxifen?
tamoxifen is typically taken as 20 to 40 mg by mouth once daily. You will usually take tamoxifen for 5 to 10 years depending on the condition being treated.
Is it safe for me to take tamoxifen?
tamoxifen is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you. You should not use this medication if you are pregnant or are taking a coumarin-type anticoagulant therapy or in women with a history of deep vein thrombosis or pulmonary embolus
tamoxifen Common Side Effects
Common side effects of tamoxifen:
- Hot flashes
- Vaginal discharge
- Swelling in the arms and legs
- Nausea
- Irregular or no monthly bleeding
- Vaginal bleeding
- Weight loss
- Skin changes
tamoxifen Serious Side Effects
Serious side effects are rare with tamoxifen. Contact your healthcare provider immediately if you experience any of the following.
- Blood clots in your veins or lungs: pain or swelling in your arms or legs, trouble breathing, chest pain, fast heartbeat
- Stroke: severe headache, sudden confusion, weakness on one side of your body, or trouble speaking or walking
- Cancers of the uterus: abnormal vaginal bleeding or discharge, pain or pressure in the area below the belly button (pelvis)
Effects of other drugs, drug classes and over-the-counter products on tamoxifen
The following medications may interact with tamoxifen:
- When tamoxifen is used in combination with cytotoxic agents, there is increased risk of thromboembolic events occurring
- Coumadin and other coumarin type anticoagulant use with NOVALDEX is contraindicated.
- Rifampicin use may cause a reduction in tamoxifen plasma levels
- Reduced efficacy on tamoxifen has been reported with concomitant usage of some SSRI antidepressants (e.g. paroxetine)
- For the primary reduction of breast cancer risk, there is some evidence that hormone replacement therapy may reduce the effectiveness of NOVALDEX
Who makes tamoxifen?
Various FDA-approved generic manufacturers
Is tamoxifen safe in pregnancy?
tamoxifen should not be used if you are pregnant. Based on data from animal studies, tamoxifen might cause harm to your unborn baby. If you’re a woman who’s able to have babies, you should use non-hormonal birth control, like condoms or a diaphragm, while taking tamoxifen and for 2 months after the last dose.
What to do if you missed your tamoxifen dose
The FDA's medical product safety reporting program for health professionals, patients and consumers.
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Medical Disclaimer
NowPatient has taken all reasonable steps to ensure that all material is factually accurate, complete, and current. However, the knowledge and experience of a qualified healthcare professional should always be sought after instead of using the information on this page. Before taking any drug, you should always speak to your doctor or another qualified healthcare provider.
The information provided here about medications is subject to change and is not meant to include all uses, precautions, warnings, directions, drug interactions, allergic reactions, or negative effects. The absence of warnings or other information for a particular medication does not imply that the medication or medication combination is appropriate for all patients or for all possible purposes.
Things to know
What tamoxifen does to the body?
Will I lose weight when I stop taking tamoxifen?
Is using tamoxifen bad estrogen?
Is tamoxifen bad for your heart?
How do you know if tamoxifen is working?
What to expect after taking tamoxifen?
Why would a man take tamoxifen?
Can I drink alcohol while taking tamoxifen?
What is the biggest risk with tamoxifen?
Why is tamoxifen bad?
Is tamoxifen worth the risks?
Is there a safer alternative to tamoxifen?
Does tamoxifen increase belly fat?
How do you get rid of tamoxifen belly?
What happens after 5 years of tamoxifen?
What to avoid while taking tamoxifen?
Can you drink caffeine while taking tamoxifen?
Is it OK to drink alcohol while taking tamoxifen?
Does tamoxifen mess with your hormones?
Should I avoid sun while taking tamoxifen?
Do most people tolerate tamoxifen well?
How much weight do you gain on tamoxifen?
How to lose belly fat while on tamoxifen?
How do you get rid of weight gain from tamoxifen?
Will I lose weight when I stop taking tamoxifen?
Does anyone feel better on tamoxifen?
How to lose weight while taking estrogen blockers?
Will my hair get thicker after tamoxifen?
Is tamoxifen hard on the body?
How does tamoxifen make you feel?
Do tamoxifen side effects start immediately?
Does tamoxifen make you puffy?
Why do bodybuilders take tamoxifen?
What are the side effects of tamoxifen after 5 years?
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