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User Reviews for Levothyroxine

Also known as: Synthroid, Euthyrox, Levoxyl, Tirosint, Eltroxin, Unithroid, Tirosint-Sol, Eutroxsig, Novothyrox Levo-T Thyquidity Ermeza Evotrox …show all brand names

Levothyroxine has an average rating of 5.2 out of 10 from a total of 799 ratings on Drugs.com. 42% of reviewers reported a positive experience, while 46% reported a negative experience.

Condition Avg. Rating Reviews Compare
Underactive Thyroid  
5.2
459 reviews 34 medications
Hashimoto's disease  
5.3
159 reviews 25 medications
Hypothyroidism, After Thyroid Removal  
5.2
159 reviews 28 medications
TSH Suppression  
5.4
16 reviews 28 medications
Thyroid Suppression Test  
3.3
5 reviews 20 medications
Myxedema Coma  
9.0
1 reviews 20 medications
Summary of Levothyroxine reviews 5.2 799 reviews

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.

Reviews for Levothyroxine

familydoctor · Taken for 1 to 6 months · November 21, 2020

Euthyrox (levothyroxine) for Underactive Thyroid: “I am a family doctor who just got lab results on a patient taking euthrox. 6 months ago her tests were fine while she was on levothyroxine generic. Walmart switched her to Euthyrox, and her labs look like she just stopped taking her thyroid medicine completely- TSH is over 15. I have called her pharmacy and asked them to start investigation of the euthyrox, replace her pills with real medicine and will be looking into what else I need to do to protect the public.”

1 / 10
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Andros · Taken for 6 months to 1 year · April 22, 2021

Euthyrox (levothyroxine) for Underactive Thyroid: “UPDATE: I posted on March 11 2021 and shared how I switched back to my regular medication from Walgreens which is just the generic Levothyroxine 88mg and stopped taking this horrible pill from Walmart called Euthyrox which is their version of the generic brand but with horrible side effects. Today is April 21, 21 and I feel like a brand new person! I finally feel normal! I prayed for this moment to feel like my old self! The horrible side effects have all subsided!! I just want to share with everyone that there is hope! I’ve been praying and trying my hardest to be patient with my body. I also was taking ibuprofen for the aches and pains in the mean time. But I can finally share with you all that I’m doing great! I pray for everyone else to feel better soon in Jesus name. There is HOPE and light at the end of the tunnel.”

1 / 10
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Andros · March 11, 2021

Euthyrox (levothyroxine) for Underactive Thyroid: “I was taking Levothyroxine 88mg from Walgreens or CVS since I was 18 now I’m 33. Switched pharmacy to neighborhood Walmart because it was closer to home back in Sept 2020. They gave me a generic called EUTHYROX said it was the exact same thing so I trusted them. They just said the packaging was different. They were so wrong! Since Sept 2020 I been having horrible side effects! Muscle aches/ pains/ stiffness ALL the time! Muscle weakness, blurred vision, chest pains, severe acid reflux GERD like symptoms. Foggy brain, forgetfulness, being so cold all the time. Didn't feel like myself at all! I almost passed out twice last week and had enough!! I went to the dr and she immediately switched me back to my meds from before. Today will be 6 days that I have switched back and my side effects have been subsiding . It was so scary and still is knowing this medication is out there! Please don’t take it. When I almost fainted and had chest pains was the scariest part for me.”

1 / 10
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joy · Taken for less than 1 month · February 10, 2021

Euthyrox (levothyroxine) for Underactive Thyroid: “In November 2020 I was diagnosed with low thyroid. My Doctor put me on levothyroxine 25 mcg. I also went to Walmart and the gave me Euthyrox. I started taking it on 11th, after taking it for one week,. I began having hip pains that radiated into my legs. My joints ached and burned. I had headaches, low energy, dizziness, confusion and foggy brain. Didn't want to move as it hurt. I am retired nurse and knew the recent change was medication. I stopped taking it on 19th November. Went to Doctors office , was told to stop taking it. By Thanksgiving I was feeling better. Took a few weeks to feel normal again. Have been prescribed synthroid today. Going to try it. It is brand name of levothyroxine. Hopefully I can use it. They need to tell people how dangerous medicine is. I will stop using walmart. They told me I was sick with virus. Treated me like I was delusional or making it up. I hope they never experience the same as I did.”

1 / 10
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NA · September 8, 2020

Euthyrox (levothyroxine) for Underactive Thyroid: “Walmart switched my levothyroxine to Euthyrox,. The first day I had a headache almost at migraine level. Within two weeks my hair was falling out, insomnia every night. Have been on levothyroxine for 12 years, with no issues. Do not take this medication.”

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Melissa · Taken for 1 to 6 months · January 9, 2021

Euthyrox (levothyroxine) for Underactive Thyroid: “Was switched to Euthyrox 4 months ago from levothyroxine at Walmart pharmacy. This change was made without my doctor's approval. I was told it was the very same medicine I had been getting before. It is not the same medication. I have begun having extreme dizzy spells severe anxiety, shortness of breath. I've been on the same dose of level thyroxine for over 10 years. And now my levels are extremely high. I'm experiencing overdose of levothyroxine. My doctor has prescribed a lower dose and wanted me to go back to taking the original levothyroxine. I went to Walmart this morning to pick it up and they filled again with Euthorox. They talked me into keeping it. After reading these comments I am not going to be taking this brand! I will be calling the FDA and Walmart Headquarters on Monday morning!”

1 / 10
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Andrea · Taken for 1 to 6 months · January 18, 2019

Tirosint (levothyroxine) for Underactive Thyroid: “I’ve been on Tirosint for 3 months now. The best I’ve felt in YEARS! I previously posted in October and I can only say if the other various thyroid medications are making you feel awful, YOU HAVE TO TRY TIROSINT! My energy level is fabulous, losing weight, no hair loss, coherent, etc and overall LIVING LIFE to the FULLEST.”

10 / 10
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Frequently asked questions

Kiran · Taken for less than 1 month · August 18, 2020

Euthyrox (levothyroxine) for Underactive Thyroid: “Please don't take Euthyrox if you are switching from Levothyroxine, after taking for a month. My hair were falling like crazy, loose stool and lot more side effects. Please think twice before taking Euthyrox.”

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Ralphie · Taken for less than 1 month · January 9, 2021

Euthyrox (levothyroxine) for Underactive Thyroid: “Walmart substituted this rubbish Euthyrox today on my refill after I specifically told them not to. I called Corporate and gave them 24 hours to deliver my regular Levothyroxine or I would not only move my scripts, I would file charges for causing harm as this Euthyrox can cause heart attacks.”

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Mom2Two · Taken for 1 to 6 months · September 30, 2020

Euthyrox (levothyroxine) for Underactive Thyroid: “Pharmacy gave me Euthyrox instead of Levothyroxine (generic). I didn't think it would make a difference, so I have been taking it for several months. Kept feeling worse but didn't connect it to the meds. To the point now I can barely function - arms hurt so bad, so tired I can hardly make it through my day, headache, etc. Called pharmacy to see why they switched it. She said, "That is just what WalMart sends us. Lots of people have been complaining and switching back." So, so am I! Hope I start feeling better soon. Shame on you, WalMart, for switching people's meds without a Dr.'s request!”

1 / 10
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Nath · Taken for 10 years or more · March 14, 2019

Tirosint (levothyroxine) for Underactive Thyroid: “A word of caution about levothyroxine - not all levothyroxine drugs are equal. I recently experienced a nasty episode with generic levothyroxine because the manufacturer changed the formula (replaced lactose with mannitol) which made me very sick for months (dizziness, nausea, over tiredness, chest pain and arrhythmia). It took a while to figure out since there was no communication of a "change" from the manufacturer. The switch to "Tirosint" was a life savior! Right away, the symptoms subsided. It is so important to check the excipients (=fillers). Tirosint has glycerin, water, levothyroxine, that's it! As an NTI drug (narrow therapeutic index), I would never risk the generic again. I was too sick and spend too much money with docs who couldn't find anything wrong with me! After doing research, I asked for just ask for the brand - I am so glad as it solved all of my "issues"!t"”

10 / 10
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Wonttakesynthroid · Taken for 10 years or more · February 16, 2019

Synthroid (levothyroxine) for Underactive Thyroid: “I was on Synthroid for 10 years. I was in so much pain in my joints, I couldn't function. This is a known side effect of this medicine. My numbers were where they were supposed to be per the doctors, but I still felt tired and my hair was still falling out. After my husband and I did research, we worked with my doctor and switched to Armour Thyroid. Within 6 weeks my pain was gone, I felt better. I wasn't tired and my hair was falling out. No matter what medicine you use - you know how you should feel. Do the research and work with your doctor. Only you know how you should feel. Don't depend on the doctor to tell you.”

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Anonymous · Taken for 1 to 6 months · August 27, 2020

Euthyrox (levothyroxine) for Underactive Thyroid: “My pharmacy changed me to this brand after being on levothyroxine. My hair has been falling out, weight gain, brittle nails and more side effects. This does not work for your thyroid. Had my TSH done in March and it was pretty close to normal range. After that the pharmacy changed my levothyroxine to this one. My TSH is low and this is why I am having the issues. I am upset that the pharmacy can just change things without checking with you first. Don't take this brand of medication”

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Anonymous · Taken for 1 to 2 years · July 26, 2019

Tirosint (levothyroxine) for Underactive Thyroid: “I was doing great on Tirosint until manufacturers changed to IBSA. I developed gastritis and arthritic neck pain, fatigue, and weakness. Felt like had the flu. This medication has cost me a lot of time and money. Please start checking for any manufacture changes to your thyroid medication.”

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Robert2013 · March 11, 2013

Synthroid (levothyroxine) for Underactive Thyroid: “Synthroid saved my life....been taking it for almost four years now. I had all of the worst symptoms in the worst way of a basically dead thyroid. I was feeling better within a week of taking it and continued to feel better and better every day for about the next six months. That's when it leveled off and I've been happy (and grateful) ever since. It took about a year or so to lose all of the weight I gained as a result of crummy thyroid. The weight just came right off after taking Synthroid. I'm on 225Mcg per day with very minimal side effects...so minimal that I can't recall what they are at the moment.”

10 / 10
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Bee · Taken for less than 1 month · September 1, 2020

Euthyrox (levothyroxine) for Hashimoto's disease: “I was switched to Euthyrox by the pharmacist at Walmart and did not notice until I got home. I called the pharmacy and asked about the drug, and was told it was the same medication, just another brand. It is not. The first day I took it I had a migraine headache, and shortness of breath. I thought it was just me, so I went on and stayed on the medication for 2 weeks, thinking my symptoms would improve. They got worse. By the time I was 2 weeks in to taking this medication, I could barely get out of bed. It was like being in a fog all the time, with absolutely no relief. I called back and spoke to the pharmacist, this time getting a different person. He told me that my Dr could specify Synthroid and they would make sure to keep it in stock. I messaged my endocrinologist and he quickly sent in the prescription specifying Synthroid only. I am already feeling better. Please do NOT take this medication.”

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sharonc2006 · Taken for 10 years or more · January 19, 2014

Synthroid (levothyroxine) for Underactive Thyroid: “Reading all the posts/comments on here - PEOPLE - if you are still feeling bad and not noticing relief from symptoms of an underactive thryoid PLEASE TELL YOUR doctor. If your doctor disagrees with you then find an ENDOCRINOLOGIST to get a second opinion. They specialize in endocrine issues which the thyroid falls under. You know your own body better than your doctor - research the symptoms of an underactive thryoid and if you are still feeling them - then get a second opinion. Never stop taking this medication on your own, it takes 4 to 6 And be aware that when you start this m weeks to notice a difference in your body. Also, ask your doctor to write DISPENSE AS WRITTEN on your prescription to avoid the pharmacy giving generic”

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More FAQ

Georgia · Taken for 1 to 6 months · October 12, 2020

Euthyrox (levothyroxine) for Underactive Thyroid: “Began taking in early June when Walmart pharmacy refilled my prescription saying Euthyrox was their new generic and what I would be getting going forward. Within days of taking first pill began to experience headaches that progressively increased in duration and frequency during the four months of taking Euthyrox. Then began the insomnia, tinnitus, heat intolerance, uncontrollable sweating, swelling in face and eyelids, diarrhea, neck and shoulder pain, blurred vision, fatigue, occasional dizziness, dry mouth, loss of appetite, and brain fog. Stopped Euthyrox almost two weeks ago and most symptoms have gone away except for headaches and neck pain. Definitely returning to prior medication this one was disabling.”

1 / 10
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granny · Taken for less than 1 month · July 27, 2020

Euthyrox (levothyroxine) for Underactive Thyroid: “My pharmacy switched me to euthyrox instead of levothyroxine. Then four hours after taking the first one I had a massive headache, didn't think anything of it. The second day same thing, only this time it was odd, I rarely get headaches so it worried me how severe it was. I called my pharmacist and asked if it was related, yes it is. I couldn't even function it was so bad. I demanded they switch it back. I then find out today that with my recent heart attack i shouldn't have even been given this med! HORRIBLE stuff!”

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RD · Taken for 5 to 10 years · April 10, 2019

Synthroid (levothyroxine) for Hypothyroidism, After Thyroid Removal: “I'm so sorry to read all of the terrible experiences some people have had. I can only speak to my situation. I had my thyroid ablated about 5 years ago. It was absolutely the right & necessary thing for me. I am currently taking 88mcg Synthroid, daily. It works great for me. I'm extremely sensitive to meds, so my dr opted to start me on a low dose & check my levels every month until I got a "normal" result. It took a few months. I now am tested every year, but also go by how I'm feeling. My dr is very understanding. FIND A GOOD DR. This med has worked great for me. I'm able to maintain a healthy weight, my hair stopped coming out, my nails are stronger, I have plenty of energy. My other lab numbers are great. I hope this helps someone.”

9 / 10
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lost31 · November 20, 2013

Synthroid (levothyroxine) for Hypothyroidism, After Thyroid Removal: “My thyroid disease was caught by my determination to find the real cause to my sudden physical & mental change. Long story short I had thyroid cancer twice (2010 & 2012). April 2013 was thyroidectomy, radiation 3 months later. It's taken all my strength not to give up. I'm finally on 175mcg & my endocrinologist is brushing off my complaints of being depressed over nothing, tired, weak, cold, forgetful, wake up to aching feet. She said 2.1 is in range & Synthroid is the solution. It isn't enough! It or my dose isn't jiving with my body. I'm so tired of being tired. Some days it feels like I have cinder blocks tied to my feet.”

3 / 10
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Rita · Taken for 6 months to 1 year · November 19, 2019

Tirosint (levothyroxine) for Hashimoto's disease: “After 12 years of struggling with Synthroid and also trying NP Thyroid which was worse. I finally found an Endocrinologist that agreed that the binders in other thyroid medications were causing my Hashimoto’s autoimmune to react therefore kept my TSH to not be in control. I have been on Tirosint for a little over a year and have noticed a great improvement to the point of not having hypothyroid symptoms. I would suggest the makers of Tirosint should make it clear of the importance of allowing 4 hours from taking the medication and eating or taking other supplements so it does not interfere. I am forever grateful to the Manufacturers of Tirosint for making this very clean thyroid medication because binders really do play a factor in Hashimoto’s. I just hope I do not develop a sensitivity to glycerin.”

10 / 10
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ACBarrie · May 12, 2013

Tirosint (levothyroxine) for Hashimoto's disease: “I was affected by the Levoxyl recall and was devastated. I had been on Levoxyl for Hashimotos for about 3 years, it was the only thyroid med that made me feel what I thought at the time was 'good'. Looking back, I wasn't good at all...no sex drive, weight gain, swollen face, extreme anxiety. I switchd to Tirosint about a month ago and when I noticed these side effects dissipating I was ECSTATIC but also so confused! I had no idea the Levoxyl was causing so much negativity in my life. Tirosint has NO Fillers, and for that reason...all those negative side effects from Levoxyl were gone. I dropped 5 lbs almost immediately taking me back to my post Hashimotos weight. Sex drive was back, anxiety decreased. Best of all, I'm just happy again!”

10 / 10
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Jo · Taken for 1 to 6 months · December 1, 2020

Euthyrox (levothyroxine) for Underactive Thyroid: “Walmart switched me from Levothyroxine, made by Alvogen to Euthyrox on October 17, 2020. I have heart failure. The Euthyrox made my life miserable. I had HORRIBLE leg cramps during the night, I had no energy. I had gone from getting a lot done around the house into just sitting. The Walmart pharmacist told me that Alvogen's warehouses are in Miami and that the Haiti hurricane had flooded the warehouses and now there was a shortage of Alvogen Levothyroxine. Finally, yesterdqay, I called the Walmart pharmacist and insisted that this drug is a bad drug. He switched me back to the product I had been on for the last five years without any all these side effects. Euthyrox should be banned in this country as it was in France. I am wondering what it has done to other organs of my body and if it was sufficient to keep my thyroid at a working level. Without a blood test at this time, I don't know.”

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Doesn’t matter · Taken for 1 to 2 years · January 3, 2020

Synthroid (levothyroxine) for Hashimoto's disease: “This stuff is just awful ! I’ve had my TSH go as high as 52.0 (wasn’t aware is was that out of control) and felt better than, than I do now on years of treatment on brand name synthroid! Endocrinologist just doesn’t seem to agree ? And now I have a whole new set of symptoms such as itchiness all over, horrible anxiety, headaches, weight gain, the list goes on and on, and nothing new has been added to my daily routine, I know it’s this medication, I hate it. Just throwing this out there for anyone else that so that you know your not crazy ! Good luck !”

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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.