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The Daily Insight

Is letrozole a chemotherapy

Author

Nathan Sanders

Published Apr 21, 2026

Letrozole is not chemotherapy, it is a type of hormone therapy that is used to treat people with breast cancer that is hormone receptor-positive. If your cancer is hormone receptor-negative, then letrozole will not be of any benefit.

Is letrozole a chemotherapy drug?

Most people who take letrozole will have had surgery, radiotherapy or sometimes chemotherapy to treat their breast cancer first. In this case, surgery, radiotherapy or chemotherapy is the first (“primary”) treatment and letrozole is an additional (“adjuvant”) therapy. Adjuvant therapy helps stop the cancer coming back.

Is letrozole an immunosuppressant drug?

siponimod and letrozole both increase immunosuppressive effects; risk of infection. Use Caution/Monitor. Caution if coadministered because of additive immunosuppressive effects during such therapy and in the weeks following administration.

What are the long term side effects of letrozole?

  • blood changes, such as decreases in white blood cell counts or platelets.
  • edema (swelling that usually affects your hands, feet, legs, or arms)
  • hair loss.
  • high cholesterol.

Is letrozole a hormone replacement therapy?

Letrozole is a treatment for breast cancer for women who have been through their menopause. It is a type of hormone therapy drug.

Can I take vitamin D with letrozole?

No interactions were found between letrozole and Vitamin D3.

Does letrozole cause chemo brain?

A study in nonhuman primates by researchers at the University of Massachusetts and the University of Maryland School of Medicine has shown that the breast cancer drug letrozole has adverse effects on the brain.

Does letrozole make your hair fall out?

Some women who take the breast cancer hormone treatments tamoxifen, anastrozole, letrozole and exemestane may also experience hair thinning because of the oestrogen-lowering effect of these treatments.

What foods interact with letrozole?

Foods like Cranberry and Evening Primrose should be eaten when undergoing Letrozole treatment for Paget Disease of the Breast. On the same lines, avoid foods like Caraway and Custard Apple while taking Letrozole treatment for Paget Disease of the Breast.

Is it better to take letrozole in the morning or at night?

You can take letrozole at whatever time of day you find easiest to remember, but try to take your doses at the same time of day each day. This will help you to remember to take letrozole regularly. Swallow the tablet with a drink of water. You can take letrozole either with or without food.

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What does letrozole do to your body?

Letrozole is in a class of medications called nonsteroidal aromatase inhibitors. It works by decreasing the amount of estrogen produced by the body. This can slow or stop the growth of some types of breast cancer cells that need estrogen to grow.

Can letrozole affect your teeth?

Does letrozole cause teeth-related side effects? Teeth-related side effects weren’t reported with letrozole use during studies. Letrozole can cause bone pain and joint pain. If these affect your jaw, it’s possible the pain could spread and feel like tooth pain.

Can letrozole cause high cholesterol?

In a small study which recruited 20 postmenopausal women, Letrozole was associated with a significant increase in total and LDL cholesterol levels 16 weeks after the initial enrollment of the patients32.

Can I drink coffee while taking letrozole?

Do not stop taking letrozole unless your doctor instructs you to. These are common and tend to be mild, though they can vary. Hot flashes and sweating can subside after the first few months. It can help to lower your intake of nicotine, alcohol, and hot beverages containing caffeine such as tea and coffee.

Why does letrozole cause joint pain?

Women taking a type of hormone therapy called aromatase inhibitors (such as anastrozole, letrozole and exemestane) for breast cancer, may have joint pain and sometimes muscle pain. This is probably caused by a decrease in oestrogen levels. Joint pain is also a common symptom of the menopause.

Can I take letrozole with other medications?

Letrozole has no known severe interactions with other drugs.

What is chemo belly?

Bloating can also be caused by slowed movement of food through the G.I. (gastrointestinal tract or digestive tract) tract due to gastric surgery, chemotherapy (also called chemo belly), radiation therapy or medications. Whatever the cause, the discomfort is universally not welcome.

Why do you have to take letrozole for 5 years?

A new trial suggests that extending aromatase inhibitor therapy with letrozole for an additional 5 years may improve disease-free survival and reduce the rate of new contralateral breast cancers in this group of postmenopausal women.

What vitamins should I take with letrozole?

Patients who received letrozole for a longer duration had a low concentration of serum 25 (OH) vitamin D. Vitamin D3 and calcium supplementation increased the concentrations of calcium, phosphorous and decreased the concentrations of parathyroid hormone and alkaline phosphatase.

Can I take multivitamins with letrozole?

Interactions between your drugs No interactions were found between letrozole and Vitamin C. This does not necessarily mean no interactions exist. Always consult your healthcare provider.

How much vitamin D should I take with letrozole?

Based on the results of the study, we recommend supplementation of 4000 IU/day vitamin D3 and 1000 mg/day calcium in postmenopausal breast cancer patients treated with letrozole who have serum 25 (OH) vitamin D concentration of < 10 ng/mL for 6 weeks.

Can you take vitamin B12 with letrozole?

Interactions between your drugs No interactions were found between letrozole and Vitamin B12. This does not necessarily mean no interactions exist. Always consult your healthcare provider.

Can you take painkillers with letrozole?

Interactions between your drugs No interactions were found between letrozole and Paracetamol. This does not necessarily mean no interactions exist. Always consult your healthcare provider.

Can letrozole cause facial hair?

Hair and skin changes You may have some hair loss or thinning while taking letrozole. However, your hair should return to the way it was before treatment when you stop taking letrozole. A small number of women notice an increase in downy facial hair. Some people also report a skin rash.

Does letrozole make tired?

This medication can cause fatigue, dizziness, and somnolence. You should not drive or operate heavy machinery until you know how this medication will affect you. The blood levels of this medication can be affected by certain foods and medications, so they should be avoided.

Can letrozole cause weight gain?

Weight gain is one of the occasional side effects that can occur when taking letrozole but if you are finding it difficult to control then it may be worth getting in touch with your doctor to let them know.

Does letrozole cause bone density loss?

Aromatase inhibitors (such as anastrozole, exemestane and letrozole) reduce the amount of oestrogen made in the body, which can reduce bone density and cause fractures.

How do I know if letrozole is working?

How will I know if Letrozole is working? You may be asked to have a blood test during the menstrual cycle in which you are taking Letrozole. We usually take this blood sample on day 21 of your menstrual cycle and measure levels of the female hormone called progesterone. A level of 30 nmol/L or more is a good result.

Can you take Tylenol with letrozole?

No interactions were found between letrozole and Tylenol. This does not necessarily mean no interactions exist. Always consult your healthcare provider.

Is letrozole hormone therapy or chemotherapy?

Letrozole is not chemotherapy, it is a type of hormone therapy that is used to treat people with breast cancer that is hormone receptor-positive. If your cancer is hormone receptor-negative, then letrozole will not be of any benefit.

Can letrozole cause liver damage?

Liver injury attributed to letrozole is usually mild and self-limited, typically a transient, asymptomatic elevation in serum enzymes. Cases of acute liver failure have been reported in women on other aromatase inhibitors, but not specifically letrozole.