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User Reviews for Levothyroxine

Also known as: Synthroid, Euthyrox, Levoxyl, Tirosint, Eltroxin, Unithroid, Tirosint-Sol, Thyquidity Levo-T Eutroxsig Novothyrox Evotrox

Levothyroxine has an average rating of 5.7 out of 10 from a total of 678 ratings on Drugs.com. 46% of those users who reviewed Levothyroxine reported a positive effect, while 41% reported a negative effect.

Condition Avg. Rating Reviews Compare
Underactive Thyroid  
5.7
386 reviews 33 medications
Hashimoto's disease  
5.7
141 reviews 25 medications
Hypothyroidism, After Thyroid Removal  
5.5
133 reviews 27 medications
TSH Suppression  
5.3
14 reviews 27 medications
Thyroid Suppression Test  
1.0
3 reviews 20 medications
Myxedema Coma  
9.0
1 reviews 20 medications
Summary of Levothyroxine reviews 5.7 678 reviews

Reviews may be moderated or edited before publication to correct grammar and spelling or to remove inappropriate language and content. Reviews that appear to be created by parties with a vested interest in the medication will not be published. As reviews and ratings are subjective and self-reported, this information should not be used as the basis for any statistical analysis or scientific studies.

Reviews for Levothyroxine

LP · Taken for less than 1 month May 11, 2021

Euthyrox (levothyroxine) for Underactive Thyroid: “I have been taking levothyroxine for several years and my TSH and T4 have remained within normal ranges with zero side effects. Recently wal-mart changed me to euthyrox and within a couple of days I started having chest pain, moody, sleepy, etc..... I went to my doctor and she put me back on levothyroxine after about 4 days I started to feel much better. Euthyrox does not work!!!”

1 / 10
Thia · Taken for 1 to 6 months May 3, 2021

For Hypothyroidism, After Thyroid Removal: “After levothroid was no longer manufactured, I tried Levoxyl. My body did not respond well to this. I get hives from synthroid. So, I am on a generic. And since I have no other alternative, I go from Mylan, to the Bayer ,now on Acella.(2 months). My legs are are swollen . Especially my feet. Muscle pain, skin itches and I have a rash. Kidney pain. Gastrointestinal problems. The list goes on. I just wish they would make a decent replacement. I have lived without a thyroid for 49 years. Have not woken up in the morning feeling refreshed. Just as tired as when I went to bed. These are no replacements.”

1 / 10
RQ · Taken for 1 to 6 months May 2, 2021

Euthyrox (levothyroxine) for Underactive Thyroid: “This medication gave me alarming heart palpitations. I quit using it and went back to levothyroxine and it went away. Tried using Euthyrox again with the same side effects happening. Will NEVER again use Euthyrox. Worst medication I have ever took.”

1 / 10

Frequently asked questions

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
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
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
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.”

1 / 10

More FAQ

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
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
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.”

1 / 10
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.”

1 / 10
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
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”

1 / 10
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
Lonesome Dove · Taken for 1 to 2 years April 15, 2021

Tirosint (levothyroxine) for Hashimoto's disease: “Oh my goodness! My endocrinologist switched me from Synthroid to Tirosint because I wasn't absorbing the Synthroid. After taking Tirosint for awhile, I started to become suicidally depressed. I'm not on many Rx, but I felt Tirosint was the culprit. I stopped taking it all together about 2.5 weeks ago. Guess what? I'm happy. (I did this on my own. Consult with doctor.) I'm not one who's into supplements, but I researched and researched and found that Selenium is supposed to help your thyroid. I've been taking Selenium since I've been off Tirosint. (Again, ask your doctor.) I'm now just taking Selenium (again, talk to doctor) and I feel great. I would NOT recommend this drug to anyone.”

1 / 10
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
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.”

1 / 10
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!”

1 / 10
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
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.”

1 / 10
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
JoyAnaBoo · Taken for 1 to 6 months October 1, 2020

Euthyrox (levothyroxine) for Hypothyroidism, After Thyroid Removal: “Walmart switched me to this brand back in April. They assured me it was the exact same thing as the levothyroxine brand I was taking. I had just had labs done in March. Things were good. By early May my TSH had jumped to a 14 from a .40. I had fatigue to the point that I was bed bound. Headaches, sleeplessness, rapid heart rate, sweats, memory issues. This medicine is a dangerous medication. My dr had several other thyroid patients complain of the same medication after Walmart switched them. It is absolutely not the same as what I was taking. This medication will crash your labs and make you feel like the walking dead. It’s shouldn’t be on the market.”

1 / 10
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”

10 / 10
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.”

1 / 10
laura April 24, 2021

Synthroid (levothyroxine) for Underactive Thyroid: “Amazing!! I started on 25 mcg brand Synthroid then 50 mcg and now I'm on 75 mcg I almost feel like the old me my TSH went from 11 to 1.7 I wake up 4 am take my medicine and go back to sleep till my 6am alarm I have a cup of coffee when I get up to start my day.”

10 / 10
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.”

1 / 10
Sky · Taken for 1 to 2 years June 18, 2019

For Underactive Thyroid: “When Dr increases the dosage for levothyroxine , I get overly anxious, palpitations, lack of conentration, can't sleep, an overall feeling of not feeling well, fainty feeling, no energy, bloated, itchy, eye problems, irritated, confusion, feeling like crying, very emotional,and this is only taking 50mg. I felt I was dying, the moment I took half of 25mg like I was doing before , I returned to my normal self, Drs don't care of your symptoms, they just want to go by the book, and I'm not the only one reporting this, others like me are out there, Drs are not listening to us,”

1 / 10
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

This information is NOT intended to endorse any particular medication. While these reviews might be helpful, they are not a substitute for the expertise, knowledge and judgement of healthcare practitioners.