Anastrozole and side effects...hair loss/thinning and hair regrowth

Posted by sandyjr @sandyjr, Mar 6, 2019

I started taking anastrozole in May 2018. The worst side effect I had was hot flashes, but I was undergoing radiation and it was a particularly hot summer here. My Dr took me off it for two weeks and I restarted it in September. I have had very few problems. The first time I had BC, I took tamoxifen and I think that bothered me more. I was anticipating problems this time. The hot flashes are gone...I never had them before in my life! I have random aches and pains. One joint in my foot seems to be tender, but it is something I can easily live with. One thing I did notice was the hair thinning. I had it with the tamoxifen and now with this. It really bothered me, but has anyone else had their hair start to grow back? I had searched the internet for a natural substance to help hair growth and found castor oil. Needless to say, I was skeptical. I put it on a cotton ball and dab it lightly on the areas by my temples and my natural hair part and my hairline by my forehead. It is an easy fix if it is a fix. Recently I have noticed new hair growth in the temple areas and in my hair part. It is about an inch + long. It is not as if my hair has suddenly thickened up a lot, but there is a difference. I am not sure if I am just getting used to the medicine or if the castor oil has any effect, but there is a difference. For me, there is an improvement, so I just wanted to let you know that there may be hope for improvement for other people.

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@sandyjr - Wow, thanks for doing the dirty work of searching😊 - I’m so glad it’s working for you! I’ll be purchasing castor oil before the end of the day. Many thanks, Sandy

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As I said, I only dabbed it on my upper hairline by face and where my hair parts. I really would like to try putting it on all over and maybe covering it and letting it sit overnight, but that would be when disaster happens and I would have to quick run out and my hair would be all greased up!!!! That would be an experience!!! I figured I would try it and so have been noticing new growth and if it is the castor oil...yay, it worked for me, and if it is getting used to the anastrozole, then there is hope for others with the thinning hair problem. Good luck.

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I have been taking anastrozole 1mg/day for the past year. In December I had my usual bob cut shorter. Well, after four months my hair has barely grown. I also must note that I now have no hair under my arms and only a few strands on my legs. Anyone else have this side effect, which I wasn't expecting? I am thankful it's not falling out in clumps. I just wish I hadn't cut it shorter in December. I'm wondering if this drug impacts the hair follicles.

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@ellenholm

I have been taking anastrozole 1mg/day for the past year. In December I had my usual bob cut shorter. Well, after four months my hair has barely grown. I also must note that I now have no hair under my arms and only a few strands on my legs. Anyone else have this side effect, which I wasn't expecting? I am thankful it's not falling out in clumps. I just wish I hadn't cut it shorter in December. I'm wondering if this drug impacts the hair follicles.

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Hair thinning/loss is a possible side effect of all AI's. I started Anastrozole after chemo in October of 2020 (total hair loss). It seemed my hair grew back slower, but since this was a first time experience I wasn't sure if this was normal. I switched to Letrozole 17 months ago and my hair is growing at its normal rate. It's thinner than I'd like, but could also be the normal aging process (I'm 68). Everything came back thinner/sparser - eyelashes/brows, all body hair. I don't miss the body hair, but I do miss the eyelashes - there but not enough to bother with mascara. I do use Nioxin shampoo and conditioner and make sure to massage it into my scalp for several minutes.

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I’ve been on it for almost a year and a monthly Lupron injection. The hair thinning has been horrible. 😢 I’ve taken multivitamins, Biotin, expensive shampoos and nothing seems to work.

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@dlmdinia

Hair thinning/loss is a possible side effect of all AI's. I started Anastrozole after chemo in October of 2020 (total hair loss). It seemed my hair grew back slower, but since this was a first time experience I wasn't sure if this was normal. I switched to Letrozole 17 months ago and my hair is growing at its normal rate. It's thinner than I'd like, but could also be the normal aging process (I'm 68). Everything came back thinner/sparser - eyelashes/brows, all body hair. I don't miss the body hair, but I do miss the eyelashes - there but not enough to bother with mascara. I do use Nioxin shampoo and conditioner and make sure to massage it into my scalp for several minutes.

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I can't blame anastrozole for my hair thinning and hair loss. My hair thinning and hair loss before I started taking anastrozole. Maybe my thinning hair is from hypothroidism? At 68 my eyebrows and eyelashes are sparse. My doctor just switched me from anastrozole to tamoxofin because of bone pain. I feel better already but hair status remains the same.

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