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Drug Ratings for SYNTHROID

Average Rating: 2.7 (780 Ratings)

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    New! Reviews Summary for SYNTHROID  | Top 10 Adverse Effects (reported to FDA)

RATING  REASONSIDE EFFECTS FOR SYNTHROIDCOMMENTSSEXAGEDURATION/
DOSAGE
DATE ADDED
sort down sort up F  M  
 1  hoshimoto thyroid My body became adjusted to it as far as labs numbers. But all my symptoms returned. My endocrinologist says that patients need to be told: THIS IS A MAN MADE MEDICINE. It becomes "non-benefitting" in many people. Those people need to take Armour Thyroid.....it is a natural hormone that the body accepts permanently and removes the symptoms associated with thyroid disease.... F 53 2 years
50
4/15/2014
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 1  hypothroidism there is a severe potency problem in these pills. I have no pulse and it seems as if I am taking baby powder and no pure thyroid hormone. So, I'm taking more and more and still very hard for me to get out of bed. kimi a 619 409-9857 Somebody HELP! FDa needs to get involved they have changed potency. SUCKS now IT used to be great! IT had great potency in2010 but somewhere around 1/2011 it, changed to crap. What is the point in treating thyroid hormone , if it does nothing.damb it! I want my life back@!!!!!! Some body please help!!! F 46 6 days
375 1X D
3/15/2014
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 3  Hypothyroid I had no bad side effects, it was the only one that seemed to make me feel better (seemed). Then it stopped working- or my body stopped responding. This sounds dramatic but I kid you not ( I finally lost 25lbs with hcg and determination and enjoyed feeling great for 2 years) within 1 -one- months time I went from size 8 to 14. My entire wardrobe stopped fitting all my hypo symptom rushed back with a vengeance.... Poor sleep, fatigue, depression, 30lbs of weight, brain fog, achey joints, temp sensitivity you name it. Nothing has improved it in a year and no dr seems to take me seriously. Found an alternative dr and am going to try ERFA thyroid. Hoping for good and great things. F 32 8 years
112
2/18/2014

 1  Hypothyroidim Headaches that wouldn't go away, Pressure in my head that felt like a bowling ball on my shoulders, constipation, anger, had trouble relating to people. When first diagnosed, was given Levothyroxine. Had my one and only migraine ever in my life. Switched to Armour, my world changed and I felt amazing again! A week or so ago, my new endo refused to prescribe Armour, even though I'd been taking it for 7 years and it was working just fine. I offered to do a short trial of Levothyroxine product. HATED THE SYNTHROID. I hated life itself while on it. My endo refused to believe that I had such severe side effects and still refused to prescribe Armour. She just lost me as a patient. I'm going to a doctor 30miles away, only because she'll prescribe what works best for me. F 40 6 days
100mg 1X D
2/5/2014

 1  Hypothyroidism Absolutely no energy, getting out of bed is a rough task BC of the extreme lack of energy. Weight gain, hair loss, mood swings, inability to lose weight, etc. F 30 3 years
100mcg
1/17/2014

 4  Hypothyroid Maybe dry skin, my hair always fell out before this medication and same fir anxiety always had this too..levels are normal F 40 8 months
25
12/28/2013
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 2  Hypothyroidism Hair loss and my mood is very labile. F 60 3 months
25 mg 1X D
12/8/2013

 1  low thyroid Brain fog, Heart palpitations, cannot sleep, joints ache, just feel lousy, tired and irritable all the time. Plan on stopping this med and would like a homeopathic med. Something w/o all the side effects. F 54 90 days
25 mcg 1X D
12/3/2013
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 3   F 33
1X D
11/30/2013

 4  Hypothyroidism None other then shorter menstrual cycles, and water retention. Not sure if its the med or stress. It took me almost two years to start feeling better. Before synthroid I was put on Cytomel which made me feel horrible and then Armour which did nothing for me because I was first told that my numbers were not low enough to try synthroid. I think when people are sick for so long, it can take a while for the drug to rebuild your metabolism. At the right dose, I think it works pretty well. F 27 2 years
88 mcg 1X D
11/29/2013

 5  Hypothyroid I haved tried taking other generic types of medication to help my hypothyroidism but had dealt with some irritating side effects with those medications. Synthroid is the ONLY medication that agrees with my body. I have no side effects, got my levels in the normal range, and I feel great! F 31 4 years
125
11/28/2013
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 1  Hypothyroidism It ruined my life. I became ill, depressed, gained weight, and ha NO energy. I couldn't even get out of my bed each morning. I lost all my friends and missed 40 days of school nearly failing my classes . No one deserves Togo through the hell I did F 17 2 years
Idk
11/26/2013
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 1  Hashimoto's Disease For the first two days, I had a lot of energy (felt peppy for the first time in years). Then the headaches started. I felt drunk all day long. I woke up feeling like I had a hang over. The brain fog was unreal...I would leave pots of boiling water on the stove, baths running, things of that nature, and have no idea I had done it. I had a terrible cough that started within 45 minutes of taking the drug and lasted for 12 plus hours. I was SO tired, way more than before I started taking it. I hurt everywhere. I felt dizzy, my stomach was always upset, my anxiety was unreal. I stopped taking it on my own, and will control my disease through diet, exercise and stress control. F 41 2 weeks
50 MG
9/9/2013

 1  Hypothyroidism Memory loss, weight gain, can't lose weight, headaches, fatigue, stress easily, moody, hair loss, muscle aches, joint aches, dry skin, bad skin acne all over, dental oral problems, forgetfulness, sensitive to light, sensitive to hot & cold, no energy, always tired, can't sleep, can hear my pulse or heart beat in my right ear very loud all the time, can't concentrate, irregular cycles, after dealing with all this it can get depressing! F 25 4 years
175
9/9/2013
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 1  Hypo Anxiety, depression, brain fog, random pain,lack of concentration, going to tears-for no apparent reason. I found this medication totally disabling for my needs. F 56 8 years
100mg
9/9/2013

 1  Hashimotos I could tell no difference the first 5 weeks, but the night before I went in for my 6 week blood work, a nerve in the left side of my face started to hurt and my ring finger on my left hand went numb. That went on for another 4 months until I took myself off of it. In that 5 months, I also developed myexedema and couldn't stand for any type of touch on my muscles. I began taking NP Thyroid and before my 6 week labs, all of the myexedema was gone and I was losing weight and feeling better. F 43 5 months
88 mcg
9/9/2013
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 1  Hashi joint aches, muscle aches, bone aches, irritability, mood swings, poor sleep...dont like it at all F 32 6 weeks
.25mcg
9/9/2013

 1  Hashimoto's hypothyroidism No side effects per se, but I actually feel that all of my Hashimoto's symptoms have worsened since starting this medication, I feel horrible - this medication has not helped me feel better in any way whatsoever, but it has brought my labs to within normal range. (In Australia) F 38 9 months
50 mg
9/9/2013

 1  HypoT Severe headache, I mean vascular-painful headache. Light sensitivity. Brain fog. Weepy/crying for no reason. Fatigued, as if I had been drugged feeling. Did not feel like myself on this drug. Nausea. Low blood sugar drops. This drug is like poison when I take it at 25 or 50 mcgs. I tried it a year ago, and had the same side effects. Some people cannot tolerate the chemicals. I am not a Hashis PT. I am not lactose or iodine intolerant. I also reacted the same negative way to a compounded Levoxothyrine generic. They pulled Levoxyl from the shelves. I could tolerate it, but pharma took that one away from us. F 44 1 days
50mcg
7/20/2013

 1  Hashimoto's/Hypothyroidism chest pains, sleep apnea, psychotic mood swings, depression, blurry vision, brain fog, extreme fatigue, weight gain, shortness of breath, joint aches, muscle aches, thinning hair, bad allergies, sinus problems, heat intolerance, poor sleep, extreme bloating, swollen feet, horrible dry bumpy spotty skin, high blood pressure and hypotension, vertigo/dizziness, blood sugar problems, heartburn, apathy, carpal tunnel, flushing, extreme anxiety, a TSH of 26 - over all general feeling of misery, malaise, pain and lack of interest in life. Finally after 4 years I found a doctor would prescribe me Nature Throid (a natural thyroid hormone like Armour) after the last doctor I saw tried to increase my medication because my TSH was 26 - yet I was having bad chest pains and high blood pressure. After one week of being on Nature Throid 99% of the horrible things I experienced and unwanted side effects from taking Synthroid disappeared. I am so lucky to have finally found a doctor who would give me something OTHER than Synthroid. Life is ok again. F 33 4 years
100 1X D
7/17/2013

 1  Thyroid Cancer Migraines, no energy, insomnia, increase heat rate, increase blood preasure F 31 1 years
200 mcg 2X D
7/14/2013

 1  Thyriod diease F 47 10 months
25 MG
7/2/2013

 4  somewhat Hypo-T. Nothing that really stands out. Currently on half of a 112-MCG pill a day. So far, so good. The first day I was on this, I went out for a good long walk and didn't feel taxed or otherwise unwell other than a headache (which I took Excedrin for, knocked it right out.) Will update later if there are any negative side-effects. F 31 3 days
56 MCG 1X D
7/1/2013
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 1  Hypothyroid Hair loss, weight gain, little things set me off. Bloating. Watery and puffy eyes dry skin etc... Was on Levoxyl for many years, went to the pharmacy and they said it has been pulled off the market, and synthroid was exactly the same. NOT F 51 70 days
88 1X D
6/29/2013
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 2  Thyroidectomy Severe brain fog, fatigue, depression, hair falling out, still gaining weight, dry....oh wait, aren't these symptoms of hypothyroidism? Would I feel any different if I stopped taking it? F 41 18 months
112 1X D
6/24/2013
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 2  Hypothyroidism Moody, tired, depressed, weight gain Before going in for blood work and taking Synthroid, I noticed that I was tired and feeling like I needed more coffee than usual. Since taking it, my labs were in the normal range, but everything feels wrong. I'm always tired. I'm moody and really irritable. Little things completely set me off and eat away at my soul. I feel completely miserable all the time. Nothing makes me happy, and I constantly find myself on the verge of tears for no apparent reason. I have no libido. I've always had to work at my weight, but I've just been gaining and gaining despite dieting. F 26 6 months
50 MCG 1X D
5/30/2013

 1  low thyroid level No energy.constant itching,mood swings,loss of appetite,hair loss.. M 64 3 months
50mcg
4/28/2013

 4  Hypothyroid for the past 6 months I have been feeling hot flashes right before I am due to take my medicine in the morning. F 31 2 years
75mcg 1X D
3/5/2013
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 1  hypothroidism Weightgain hair loss watery eyes huge mood swings heart palpitations loss of concentration'panic attacks! Very bad headaches . I would not reccommend this drug if you have anxiety or depression it makes it much worse!!!! M 41 1 months
25
2/8/2013

 1  Hypothyroid Extreme fatigue, blurred vision, burning eyes, muscle aches and pain, depression and crying. Extreme hypothyroid symptoms times 50. F 27 7 days
30
11/19/2012
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 1  Hashimoto's Anxiety. Constant pessimism. Severe mood swings. Snapping at loved ones for no good reason. Thyroid storm (look it up, scary). Synthroid has turned me into a raging @sshole. Little things, like thinking my wife is about to pour wine into my water glass (which she wasn't), and I bite her head off. Before this, I was normally a calm, collected person, but now I am prone to rages. I dropped an F-bomb in someone's voice mail. I always feel on edge, walking on eggshells in dealing with people. It feels like someone else is taking over my thoughts and actions, and I feel shattering remorse and regret as soon as they happen. I may have Hashi's, but these side effects are way worse than my "condition." I even had a "thyroid storm," which included 200bpm heart palpitations, felt like my heart was going to explode, and I became incoherent. Never had any of this before taking Synthroid. M 45 14 months
25 mg 1X D
8/29/2012

 3  thyroidectomy due to papillary ca Have noticed slow & steady weight gain & major hair loss, some stiffness in knees. Was hoping for more energy. I had one great energetic day since starting this, the rest of my days I get by but can't do anything extra like go for a walk. My main concerns so far are the weight gain & hair loss which my endo insists are not caused by the med. I guess I feel okay considering the circumstances. I would like to try something else, I will give this med a couple more months & see how I feel. F 58 4 months
100mcg
8/8/2012

 2  hypothyroidism severe mood swings, anxiety, crying for no reason, felt that I was in a fog. Difficulty taking deep breath. Chest heaviness F 43 14 days
50mcg 1X D
7/15/2012

 5  Thyroidectomies/Goiters When my medicine is too low I have hair loss, fatigue, memory issues, depression, sensitivity to cold, constipation, longer menstral cycles. When it is too high I have insomnia, hyperactivity, sensitivity to heat, diarrhea, shorter menstral cycles. When I was 13 I had the left half of my thyroid taken out with an egg size goiter. When I was 14 I had the rest of my thyroid and a quarter size goiter taken out. I have been on Synthyoid for more than half of my life and it works very well when taken as prescribed and and if you take it at the same time each day. F 28 15 years
137 1X D
7/4/2012
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 1  Hashimotos disease Hair loss, fatigue, brain fog, memory problems. . . Synthroid seems like a mere 30% solution to my disease. There are many other medications for thyroid - T3, Desiccated thyroid. Now, just finding a good doc to try these above two wonderful therapies. M 20 2 years
125 mcg
6/9/2012
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 2  hypothyroidism I gained from 135 to 165 before synthroid. Of course, I was concerned. I had never been overweight that much. I was diagnosed with hypothyroidism. After taking Synthroid, I kept gaining more weight. 2007 I had kidney cancer, I had a surgery where my stomach wouldn't wake uo. I still gained weight. For some stupid reason, I put in a lap band put in. I wasn't eating that much. I couldn't eat for six weeks and gained 2 lbs. When I had a surgery go real wrong in Sep 2010, the nurse noticed after a week that I never ate that much. she told me she had patients that bloodwork showed normal but synthroid didn't stop them from gaining. That it causes fake blood reading in some people The Drs. said she didn't know anything.. I am still on synthroid because they act like they have no other drug. It's to the point that I am now 235 lbs. I stay secluded. My husband did not find me attractive overweight, We divorced for other reasons after 18 years but this problem didn't help. I look awful. They act like there is no other medication for hypothyroidism F 56 9 years
.088 1X D
6/4/2012
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 5  Hypothyroidism None. Synthroid has worked great at controlling my hypo symptoms. I have been very, very happy with it. F 40 12 years
62.5 1X D
5/29/2012

 5  complete thyriidectomy- cancer None F 42 2 years
200 mg
5/10/2012

 5  Thyroidectomy Complete - Cancer None at all!! I have been taking synthroid for 14 years and it has helped me feel normal again and live a fatigue free, pain-free, energetic life. This has been my miracle drug and I take it religiously!!! F 46 10 years
150mcg
4/9/2012

 5  Goiter & hypo symptoms levels norm None on it but I'm taking every other day to start and For lack of a better word feel like crud on the off days F 35 1 weeks
125mcg
3/24/2012

 2  Hypothyroid Exhaustion, steady wt gain in spite of low appetite & frequent exercise, pains in hands, feet & outer hips, difficulty thinking clearly, obnoxiously teary. On 'max dose' for close to 40 yrs after undergoing radioactive iodine ablation. Sometimes test results would be in the low normal range of 4.0-5.5, sometimes above 6.0. Was refused higher doses because it 'might cause osteoporosis'. Have switched to Armour Thyroid - doc doesn't like it, but I'm feeling human again, & close to 90 pounds literally fell off. Not perfect, but wishing I hadn't lost almost 4 decades before finding there was an alternative. Also found there is a 'sweet spot' at the high end of the new range of .3-3.0 where I feel best, though doc is also resisting that idea. If Synthroid isn't working for you, Armour is worth a try. It's also faster acting & cheaper. F 55 38 years
2.0 1X D
3/22/2012

 4  Goiters- thyroidectomy I feel a lot better. I mean my thyroid worked one except for the egg sized goiters...I haven't had my period in 3 months because of Synthroid too! F 15 3 months
100mcg
3/3/2012

 5  Hypothyroid None After my first dose I felt GREAT. Better mood, less tired, less muscle aches. Day 2 was the first morning in a LONG time that I woke up NOT feeling the aches and pains of a 90 year old. I took my 2nd dose and have felt fantastic all morning. It is now early afternoon. Usually I would start feeling very tired around this time and need a nap. I really hope this improvement keeps up! I realize it has only been 2 days, but so far 75mcg seems to be working. I take it first thing in the morning with a full glass of water and then wait 30 minutes before having my coffee. If anything changes, I will post a new rating. So far so good ;) F 40 2 days
75mcg 1X D
2/26/2012
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 1  Thyroid Removed due to papillary Ca Severe joint pain in hands and feet. Tired all the time and experienced severe highs and lows. Swelling, muscle aches and cramps I was NOT converting it to T3. My bloods were in normal range but I continued to feel horrible. Switched to Armour and started to feel GREAT on DAY#1. F 42 120 days
125 1X D
2/24/2012
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 2  Low free T4 / free T3 - hypothyroid Not differences noticed at first, but gradually started experiencing suicidal thoughts, extreme sadness, etc. that wasn't there prior to Synthroid. I think it may have something to do with needing more T3. Taken first thing with water then no food for 1 hour. Also taking prometrium (progesterone) and dhea. I have thyroid-adrenal-ovarian imbalances. F 32 2 months
50 mcg 1X D
2/23/2012
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 4  slightly low thyroid I was tired all the time had extreme anxiety really bad pms and very light periods i also noticed that i was having problems getting pregnant ive noticed these changes since i had my son in 2008 and they started to get worse as time went on i felt depressed all the time and wanted to sleep all day and was gaining alot of weight Ive been taking synthroid for about 5 days so far and ive noticed a big difference it helped alot with my fatigue so im hoping for the best and that i only continually feel better F 23 5 days
25 1X D
2/12/2012
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 1  doctor said i had to I weigh 100 pounds if I am lucky the doctor keeps switching my dosage it never stays the same for any length of time In the past month I have been lucky if I can even stay awake however I have bad heart palpitations all the time so my doctor said to cut my pills in half not to sure what to do anymore ! honestly whats a girl to do sleep 24 hours a day or take the dosage and maybe have the chance of serious health problem either way to me it no way to live F 33 11 years
175 1X D
2/5/2012
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 1  Hashimotos Thyroiditis MIGRAINES, low-grade fever, sensitivity to light & smell, either hot or cold all the time, NAUSEA, occasional vomiting, memory problems, emotional detachment, still NO ENERGY This medicine makes me feel like I want to die. My levels keep coming back in the "normal" range so my dosage is perfect apparently. I am sick and tired of being sick and tired I only get to see my endocrinologist once a year I'm still in school & I have a job and all of this just makes everything worse F 16 1 years
100 MCG 1X D
2/2/2012
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 2  thyroidactomy due to ca. headeche,badmood,bone pain ,sleepy, all these side effect came after i changed from euthyroxine to synthroid , i'm back to euthyroxine tablets . M 46 10 days
1
1/27/2012
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 5  Hypothyroid Constipation. This saved my life. I felt so much guilt over sleeping so much, I love my life, but I was so depressed, tired, weak hair, nails. Then my doctor found out my thyroid was busted.. I was so grateful !! It wasn't me after all.. I am still battling insomnia- hypo realted.. but everything else is awesome !! F 47 7 days
50 MG 1X D
1/24/2012
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 3  Hypothyroidism I started taking Synthroid due to being freezing cold all the time. Started out with 25mg and it worked for a while. Started getting cold again so Dr. upped dosage to 50mg. Within 2 weeks I gained 7 pounds. Stomach and face became bloated. This medicine does not work well with me. I have stopped taking it. F 33 3 months
50mg 1X D
1/13/2012
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 5  Hypothyroid No side effects at all. My hair, skin, and nails have never looked better. Also my daily anxiety disappeared after 3 months. I was able to lose 70lbs in 5 months while eating right and working out... Something I could never do before starting the synthroid. My life has improved 100%! F 29 2 years
137mg
1/5/2012
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 1   Loss of memory, tired and cold. Why is it still on the market and is there a way to retrieve my memory. F 76
1X D
1/4/2012

 4  Hypothyroid weight loss, goiter went away, increased energy. Normal BM's. I was diagnosed very young with hypothyroid, It took a long time for my goiter to go away and my weight to even out. Recently I've noticed that my energy has decreased and my neck felt swollen. Just had an ultrasound done, now I have a tiny nodule on the upper left portion of my thyroid. I just had an increase in my dosage from 75mcg to 112mcg. Doctor says it will take about a month or so to notice a difference. I am hoping everything returns to normal and that my nodules remain small and benign. All I can do now is wait an hope for the best. F 23 15 years
112mcg 1X D
1/3/2012

 1  Hypothyroidism F 43
150 mcg 1X D
12/26/2011
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History
 4  tsh 3.5 It took over 6 months but my energy is so much better, not cold all the time and my weight has stayed the same since I started taking it. 42 9 days
50
12/23/2011

 3  thyroid slightly off Hair thinning in front, will it get back were it use to be ? F 38 8 months
50mg
12/19/2011
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 1  hypothyroidism unexplained hysterical crying spells, mild stomach cramps F 37 30 days
50mg 1X D
12/17/2011

 4  hypothyroid only while pregnant Feel great when I take it. I also been loosing weigh, been less hungry, and more active. F 21 1 years
62.5 mcg
12/9/2011
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 2  Diagnoses hypothyroidism Retaining water especially in my thighs,drier skin, foggy thinking, stiff joints F 53 6 months
50mcg
12/3/2011
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