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Letrozole for Breast Cancer User Reviews

Brand names: Femara

Letrozole has an average rating of 5.3 out of 10 from a total of 107 reviews for the treatment of Breast Cancer. 33% of reviewers reported a positive experience, while 34% reported a negative experience.

Letrozole rating summary

5.3/10 average rating

107 ratings from 125 user reviews.

Compare all 184 medications used in the treatment of Breast Cancer.

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Reviews for Letrozole

  • Duchess
  • Taken for 1 to 6 months
  • January 29, 2019

"I was diagnosed with stage 1 breast cancer in 2015 at age 58. A lumpectomy was performed, and I was treated with four weeks of radiation. The cancer was 98% estrogen positive. I began first with Arimidex post-op, but after a while, I experienced severe muscle cramps (which may have been caused by a combination of medication problems at the time) and eventually switched to Letrozole. The cramping that I experience in my legs now is not nearly as severe and is doable. I've been on Letrozole for about a year and a half now. I'm writing because I wanted to let you know that if you are experiencing hair thinning while on Letrozole, I have found that taking a B-complex vitamin pill on a daily basis has been very helpful for me. My hair was thinning, but after about six months of taking a B-complex vitamin pill every day, I noticed that my hair thickened, and it now basically stays on my head. Just wanted to pass this information along."

7 / 10
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342 Report
  • Rebecca
  • October 1, 2019

"I’ve been on Letrozole for 4 years. I had a lumpectomy with radiation, no chemo. I have severe back, hip, and groin pain, muscle fatigue, sleepless nights, and exhausting days. I walk like I’m 30 years older than I am. My pain averages from 5-9 out of 10. I can’t remember a day where I did not have pain. I have a few good days in between the awful days which gives me false hope. I’ve spent hundreds of dollars ruling out other disabilities only to hear the same result - your x-rays, CT scans, and MRIs are fine. I have no quality of life. I used to be a very fun-loving person but rarely smile anymore because of pain. My goal each day is just to get through it. I’ve stayed on Letrozole in hopes that my cancer would not return. I have an oncology appointment this week, and I will be talking with him about discontinuing Letrozole so I can start living again. My heart goes out to all of you who have to deal with these awful side effects."

2 / 10
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281 Report
  • Femar...
  • October 8, 2013

Femara (letrozole) "I have been on Femara for 9 months. First few months were tolerable; as time progresses, I am miserable. In the beginning, I experienced nausea and diarrhea. As this went away, the bone and joint pain began. I would be awakened from my sleep in tears as my hips would ache just from lying in bed. My hands and fingers hurt to make a fist or do any type of extended writing. My knees ache horribly. When I get out of bed in the morning, I need to stand still for at least 2 or 3 minutes until I can get my legs to work. The same thing happens when sitting for any length of time. I am 45 and feel like I am 85."

1 / 10
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488 Report

Frequently asked questions

  • noosa
  • April 11, 2012

Femara (letrozole) "I am 65 and have been on Femara for 2 years. Side effects quite severe. Joint pain, lost libido, dry vagina. However, it is what it is and we must continue to take. So, I decided to fight the effect; dry vagina improved with a non-hormonal lubricant. For joint pain, fish oil, magnesium, zinc, and calcium twice a day, big improvement. Also, each morning no matter how stiff you are, go walking, it warms up the joints and gets you going for the rest of the day. I also do weights 3 times a week to increase muscle to protect bones. All have made a big difference. No weight gain. Vitamins have certainly helped keep hair and skin in good condition. Three more years of it so it's best to just keep trying to counteract the negative effects."

5 / 10
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518 Report
  • Loving...
  • Taken for 2 to 5 years
  • October 9, 2013

Femara (letrozole) "After a lumpectomy for stage 1 breast cancer, I was prescribed two other aromatase inhibitors prior to Femara. I had occasional head pain in one spot from all of them. I also had trigger finger and terrible knee pain from Arimidex. My doctor then put me on brand name Femara and the joint pain, head pain, and trigger finger all went away. What is bothering me now is the hair loss (can see my scalp!), memory loss—constantly groping for words. Sometimes I do feel like I'm 'foggy' but mostly I just can't remember words. I feel it is getting worse as time goes on and I do not understand why others report the same but there is no mention of this in the patient information leaflet."

8 / 10
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411 Report

Are you taking this medicine?

  • Jaycee
  • Taken for 1 to 2 years
  • October 9, 2019

"After mastectomy surgery, stage 2, cancer in 2 lymph nodes inside mammary tissue. No chemo/radiation. Began letrozole, experienced hot flashes and insomnia. After one year, no hot flashes but sleep disruption. As I entered the 1.5-year mark taking letrozole, I began to have joint pain, deep aching, and less strength in hips and knees. As a former therapist, I switched to exercise in the pool as I could no longer tolerate joint pain with land-based exercise. By the 2-year mark, decreased stability when walking, difficulty climbing steps, and getting up from a chair or toilet. Prior to surgery, I had been walking 3 miles a day. Now, pain limits walking to a block. X-rays prior to surgery showed no significant arthritis in any joints. Now unable to get out of a chair without 8/10 pain. Stopped taking the medication, and 3 days later pain decreased from 8/10 to 5/10. 3 weeks after stopping the pill, pain is at 3/10, with lingering weakness in hips and knees. Mind is now less foggy. Quality of life is more important than continuing to take this medication."

1 / 10
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177 Report
  • Ali
  • Taken for 6 months to 1 year
  • February 26, 2020

"I’ve had cancer twice. This second time, I have Stage 3 breast cancer and had to have chemotherapy. I’m on Letrozole, and have been on it since September 2019. Firstly, I can’t believe the pain I’m in. It’s got worse by the week/month. I’m a Pilates teacher and work every day, but I’m finding that there are things I can’t do now, as my hands and elbows are unbelievably painful. I can take a lot of pain, but this is bad. When I get out of bed or up from sitting, I can barely walk away. I also have groin pain and lower back pain, yet I’m fit and strong in every other way. This is getting me down, as I feel I’m on a slippery slope. It doesn’t help that I am high risk for another cancer, and that every pain worries me. I’m sorry that there are so many who are experiencing this."

5 / 10
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152 Report

More FAQ

  • NJgirl
  • August 2, 2019

"Was on Letrozole for 7 weeks. Had debilitating side effects which included nausea, vomiting, appetite loss and weight loss; chronic fatigue syndrome type pain, bilateral swollen glands, joint pain, inflammation in any prior injury area, pain radiating from shoulders down to hands; anxiety including body tremors, agitation, depression, uncontrollable crying, feelings of hopelessness and helplessness, feeling of being hit by a truck, the flu, laundry kicked down three flights of stairs; no energy, need to sleep during the day, inability to sleep at night; hair loss and hair thinning just to name the top side effects. Voluntarily went off drug. Oncologist confirmed that some women just can't handle this drug and I am one of them. A month later I am back to normal. I am cleaning house, I am sewing, I am reading and swimming."

1 / 10
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163 Report
  • Kestrel
  • Taken for 1 to 2 years
  • April 29, 2019

"I have been on Letrozole for just about a year now. My comment is this. Not all generics are the same. When I first started, I had no side effects whatsoever. My oncologist couldn't believe it. Then after six months, my pharmacy switched brands and I began getting hives and severe joint pain; the new brand they were giving me was from Teva. I recently asked them if they could still get the brand (Breckenridge) that they had originally given me and they said yes. I'm now taking that one again. No hives, although I do still have some lingering joint pain. I've had the same experience on a couple other meds I take, i.e., when my pharmacy switches brands I've had problems. So I'm just saying that sometimes it's not the medication, but the manufacturer."

7 / 10
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153 Report
  • Tooty...
  • Taken for 1 to 2 years
  • April 10, 2013

Femara (letrozole) "I have been taking Femara for almost two years now after my second surgery for estrogen receptor-positive breast cancer with no lymph nodes involved. Sure, there are multiple side effects, some pretty tough to deal with sometimes, but I am 66 years young and I love living. Give it a go and keep on living."

10 / 10
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271 Report
  • Smittie
  • May 15, 2017

Femara (letrozole) "I've been taking Femara for a little over 5 months and have yet to experience any side effects whatsoever. I'd been warned about hot flashes, night sweats, joint pain, muscle pain, and so far nothing. I have two smallish tumors in one breast that we caught very early on, and at my 4-month ultrasound they've decreased by about 50%. I'll have a nipple-sparing mastectomy in about 2 weeks with DIEP flap reconstruction... the grossest part of this whole episode, in my opinion... followed by radiation. No chemo here, just a very healthy mostly vegetarian diet and tons of walking. I'm 69, 5'6'', 135 pounds, and so far consider myself about the luckiest cancer patient anywhere. Maybe I'll start feeling sick at some point, but not yet. Hang in there, ladies!!"

10 / 10
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188 Report
  • rosies...
  • February 8, 2012

Femara (letrozole) "I had many side effects, including hot flashes, confusion, stomach problems, vaginal dryness, tired easily, and bone weakening. On the bright side, I have had no recurrence, and it is now 12 years since my diagnosis with lymph node involvement."

7 / 10
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278 Report
  • Anonymous
  • January 2, 2011

Femara (letrozole) "I am 46 years old, Stage IV MBC to lungs. I have been on Femara for 1.5 years. My tumors were 40% down after one year, and I am about to do the next CT scan soon. My side effects are minor muscle pain (and possibly some anxiety but may be unrelated). I have simultaneously adopted a vegan lifestyle and do regular exercise (yoga and walking). I have so much energy I don't know what to do with it. I don't gain weight either, and my muscle pain is usually gone after a brief stretch or walk. I highly recommend a vegan diet and exercise to those who want to minimize pain. Thanks all and good luck."

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  • Chille...
  • Taken for 1 to 6 months
  • January 26, 2015

Femara (letrozole) "Had Grade A Breast Cancer that was caught early. Had a mass and one lymph node removed. Went on Femara on Nov. 8, 2014, the day after I finished radiation. At first, I didn't notice anything. Slowly the pain in my feet started, then other joints in my body. I felt like I was having trouble getting air into my lungs. I started feeling like I was in a fog. I already had been diagnosed with depression years ago which was under control with medication. I started experiencing depression a couple of weeks ago which included waking up and crying. That turned into suicidal depression. Without pain medication, I couldn't move around well. The bottom of my feet were killing me. I work full time. I quit the Femara 2 days ago."

1 / 10
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206 Report
  • Little...
  • July 9, 2009

Femara (letrozole) "I have been on Femara for 3 months. After taking Tamoxifen for approximately 2 years, which I could not tolerate any longer, my oncologist put me on Femara. While my hot flashes have pretty much disappeared, the joint and bone pain I am suffering is unbearable. My elbows, hands, fingers, knees, ankles, and feet are the worst. In the mornings, I cannot get out of bed. I take thyroid medicine in the morning and cannot open the bottle. It takes about 20 minutes before I can close my fingers or bend my toes. Nighttime is also bad. After sitting for short periods, I cannot get up. I have never felt better in my life except for the constant agonizing pain. I am a very active 49-year-old but feel like I am 90. This pain gets worse every day. I can only imagine what it will be like in 3 more months. I am seeing my oncologist this week and am going to tell him I am stopping this drug. I believe the quality of my life is more important than the quantity."

5 / 10
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274 Report
  • Billy...
  • October 11, 2013

Femara (letrozole) "I have been on Femara for 3 years now, following 5 years on Tamoxifen as part of the Tango treatment for breast cancer. I have experienced severe joint pain, vaginal dryness, loss of libido, etc. But thought it was worth the effects in order to keep me 'cancer-free'. I was diagnosed with breast cancer in 2003. I have also had issues with bone problems i.e. broke my foot 4 years ago & chipped my knee joint. But hey, I'm still here. Keep persevering, girls!"

9 / 10
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212 Report
  • Erica...
  • February 9, 2013

Femara (letrozole) "I have been on Femara for almost a year. At first, I had nearly constant hot flashes and night sweats. I was started on Effexor with nearly immediate relief. I have had increasingly painful joint and muscle pain, especially in my knees. Nothing seems to be helping much with that, and it has been a major detriment to my quality of life. I have recently added Magnesium, Fish Oil, and Glucosamine/Chondroitin to the Calcium and D3 I had been taking. Hopefully, this will ease the joint stiffness and pain. I am 52, and some days I feel 92. Still, I am cancer-free so far, so I will continue to take Femara."

7 / 10
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211 Report
  • Stage...
  • Taken for 6 months to 1 year
  • January 9, 2020

"Started on Anastrozole for 4 months. It was debilitating to me. Could hardly move, could not sleep, could not focus, had serious brain fog. Oncologist switched me to Letrozole. Started off good, then about 4 months into it, I noticed my hands and feet were so sore, could hardly move them. Swelling, weight gain, intense hand, knee, and foot pain, foggy brain, sweating all the time. The knee pain got so bad, I could hardly walk. Took myself off them, seeing the oncologist in a couple of months. She said I had to have a bone scan and possible transfusion because Letrozole was known to cause issues with bones. I am 54 years old and was feeling like I was 80. I want a quality of life, decided to take the risk at this point. They all have the same side effects, not worth it to me."

1 / 10
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103 Report
  • Almost...
  • Taken for 1 to 2 years
  • January 6, 2020

"I was on Letrozole for one year. Stage 1 breast cancer, no lymph node involvement. ER/PR+ HER2- Why I was put on this drug is beyond me. I now need hip replacement. I have stress fractures in my shin. Every joint in my body aches. I stopped taking the drug after one year. When I see my oncologist I will tell him I stopped taking it. Although I stopped the drug in November, I am still having bone pain and joint pain. I use a walker because of my hip and stress fractures. I did not have any problems before taking this medication. I hope the FDA changes it’s use for breast cancer patients."

1 / 10
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95 Report
  • Jan
  • May 15, 2016

"After taking Letrozole for about 6 months, I had the aching muscles, etc., felt like a 90-year-old! Then I did a lot of research! Take your calcium and MAGNESIUM (which is a muscle relaxant); it is amazing, no more aching bones! I take 2 magnesium a day, one in the morning and one an hour before I go to bed. Don't take it at the same time as your calcium; wait a couple of hours! Read up about this brilliant supplement! It also gives you energy, etc. I seriously thought about stopping taking Letrozole, but along with the Adcal and Magnesium, I feel great! Also, I get these on prescription!"

8 / 10
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145 Report
  • tinyb...
  • Taken for 6 months to 1 year
  • April 29, 2023

Femara (letrozole) "Awful! I've been on Femara for about 8 months. And since I started, I seem to have every single side effect. My joint and muscle pain is excruciating. In no particular order, I suffer with body pain (fingers, hands, shoulders, chest, back, sides, hips, legs, feet - basically everything head to toe). Plus, weight loss, hot flashes, headaches, dizziness, thinning of hair, dry mouth, high BP, night sweats. Even my scalp is tender. Chest pain that radiates to upper arms, shortage of breath, over all depression. Chills, insomnia, intestinal pain - sharp pains, plus dull aching. Constant feelings of nausea, diarrhea, constipation. I'm afraid to eat but also have little appetite. Brain fog, shortness of breath. Feeling that I am just going to die. Sitting up in pain all night. I hurt everywhere - too sick to move; too sick to cry. Feels like I am going to have a heart attack. Can’t lie down, can’t stand up. Full body chills, hands shaking. Haven't slept through the night in months."

1 / 10
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29 Report
  • Anonymous
  • July 7, 2014

"I have been on Letrozole for 9 months. I have dry mouth, extremely dry skin, vaginal dryness, reduced libido, weight gain, and hair loss. My joints are increasingly stiff and painful. I wake in the night from pain and can scarcely walk first thing in the morning. My breast cancer was stage one and I had both breasts removed. I am considering stopping taking it."

4 / 10
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146 Report
  • Shorty
  • September 21, 2016

Femara (letrozole) "I've been taking letrozole (Femara) for 9 months, after a right-side mastectomy for stage IIA breast cancer. I'm ER & PR positive. No radiation or chemo. I'm 58 & this is the only drug I take, besides vitamins. The first 6 weeks I had trouble sleeping, occasional dizziness, some joint pain, & mild headaches. Around 4 months in, I started losing hair. I'd guess approximately 25% of my hair has fallen out. Besides the hair loss, I have dry eyes, genitals, & skin. There's some stiffness & joint pain in my hips. These side effects are tolerable, especially knowing that the drug is preventing a cancer recurrence. None of these side effects are enough for me to stop taking letrozole!"

8 / 10
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120 Report
  • Miledha
  • Taken for 1 to 6 months
  • April 27, 2016

"After 4 months on Letrozole, I felt like an old crock, in pain everywhere, barely able to move, depressed, not sleeping well and developing carpal tunnel syndrome. I've gone off it ready to try something else and after only a week, nearly all the pain and stiffness is gone. I'm sleeping well and have a sense of well-being. Letrozole stole my quality of life and I'm glad I discovered it after not too long. Let's hope other drugs are better tolerated, but if not, I'd rather have quality of life than quantity of pain."

4 / 10
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  • Deb
  • Taken for 1 to 2 years
  • April 2, 2019

"I have been on Letrozole for a year now and the hip pain has progressively gotten worse. The hot flashes are manageable now, but the hip pain is debilitating. I can't take NSAID's because thanks to chemo I know have ulcerative colitis. I am about ready to stop the Letrozole because my oncologist told me all the cancer drugs have the same bone and joint pain side effect. I feel like I am 90 years old and can't barely walk at times. Her response is "at least you don't have cancer" - thanks Doc but I have other debilitating problems."

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86 Report

Reviews may be edited to correct grammar/spelling or to remove inappropriate language and content. Reviews that appear to be created by parties with a vested interest are not published. This information is not intended to endorse any particular medication. While these reviews may be helpful, they are not a substitute for the expertise, knowledge, and judgement of healthcare professionals.