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Synthroid

User Ratings
Out of 10
Satisfaction
6.2
5.2  Effectiveness
4.3  Side Effects
5.4  Holistic Benefits

RateADrug users have reported 6 Synthroid side effects and 4 Synthroid benefits.

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Treatment Information
The generic name of this medication is levothyroxine and brand names are Levoxyl and Synthroid.
The active ingredient of Synthroid is levothyroxine sodium thyroid hormone.
Mainly used in treating low thyroid hormone levels and certain types of goiters.
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How does your Treatment Compare?
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BrandsEffectivenessHolistic BenefitsSide
Effects
Number of Ratings
6.77 6.44 2.37 13 Get Info
4.86 5.08 3.34 83 Get Info
4.43 4.43 3.05 47 Get Info
2 3.36 5.24 11 Get Info
1.05 3.58 5.45 21 Get Info
View All About these Scores Get Your Score
Effectiveness of Synthroid by Condition
Click on a condition to view RateADrug.com users ratings
- - - - - - - - - - - - - - - - -
Effectiveness on "Hypothyroidism"
Bar Chart
About these Results  
Not at all Mildly Moderately Very Extremely
How effective is SynthroidGet Your Score
Reported Changes in Health and Well-Being
Since taking Synthroid, RateADrug survey participants noticed these changes in their health:
Effect on:Much WorseWorseNo ChangeBetterMuch Better
Appetite 5.8% 15.2% 58% 14.5% 6.5%
Balance/Equilibrium 3.7% 6.7% 75.6% 10.4% 3.7%
Blood Pressure 6.6% 4.4% 80.1% 6.6% 2.2%
Breathing 5.1% 8.1% 72.1% 12.5% 2.2%
Confidence 5.9% 7.4% 69.9% 9.6% 7.4%
Coordination/Motor Skills 5.1% 5.9% 68.4% 14.7% 5.9%
Digestion 5.9% 5.9% 70.6% 12.5% 5.1%
Emotional Well-being 6.6% 13.1% 56.2% 15.3% 8.8%
Energy 10.1% 15.2% 35.5% 24.6% 14.5%
Eyesight 5.9% 6.6% 79.4% 5.1% 2.9%
Memory 5.8% 14.6% 65% 8.8% 5.8%
Mental Clarity 5.8% 12.3% 62.3% 11.6% 8%
Pain 5.1% 5.8% 70.1% 12.4% 6.6%
Patience 5.1% 11.8% 61.8% 14% 7.4%
Sexual Health 5.9% 4.4% 77.9% 8.1% 3.7%
Skin Complexion 4.4% 8.8% 71.5% 11.7% 3.6%
Sleep 7.3% 16.8% 52.6% 14.6% 8.8%
Stress Level 7.3% 12.4% 62.8% 11.7% 5.8%
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Commonly Reported Synthroid Side Effects
RateADrug survey participants experienced these commonly reported side effects:
Effect on:NoneMildModerateStrongSevere
Swelling 57.1% 0% 42.9% 0% 0%
Cold Symptoms 85.3% 8.8% 0% 2.9% 2.9%
Headache 67.6% 13.5% 5.4% 13.5% 0%
Skin Rash 91.9% 3% 0% 2% 3%
Gas 79.4% 11.8% 8.8% 0% 0%
Fatigue 67.4% 12.6% 10.4% 5.2% 4.4%
Depression 76.5% 14.7% 5.9% 0% 2.9%
Sensitivity to Light 85.3% 2.9% 5.9% 5.9% 0%
Mood Swings 67.6% 14.7% 8.8% 8.8% 0%
Blurred Vision 79.4% 14.7% 2.9% 0% 2.9%
Breathing Difficulties 86.5% 10.8% 2.7% 0% 0%
Sexual Dysfunction 84.8% 0% 12.1% 3% 0%
Stomach Ache 79.4% 5.9% 8.8% 2.9% 2.9%
Breast Tenderness 0% 0% 100% 0% 0%
Confusion 82.4% 8.8% 2.9% 5.9% 0%
Fever 94.1% 2.9% 2.9% 0% 0%
Irregular Heartbeat 76.5% 14.7% 2.9% 5.9% 0%
Anxiety 64.7% 17.6% 2.9% 8.8% 5.9%
Chills 83.5% 3.3% 6.6% 3.3% 3.3%
Drowsiness 80.8% 6.2% 3.8% 5.4% 3.8%
Nausea 85% 6.3% 4.7% 1.6% 2.4%
Coordination / Balance Problems 85.4% 9.4% 1% 0% 4.2%
Dizziness 76.9% 13.4% 4.5% 2.2% 3%
Change in Weight 52.8% 16% 16% 8% 7.2%
Itching 62.5% 25% 12.5% 0% 0%
Insomnia 70.6% 8.8% 11.8% 2.9% 5.9%
Allergic Reaction 92.1% 2.4% 1.6% 3.9% 0%
Hives 95.9% 1.6% 0.8% 0% 1.6%
Muscle Cramping 82.4% 8.8% 0% 2.9% 5.9%
Diarrhea 88.2% 8.8% 0% 2.9% 0%
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Less Commonly Reported Synthroid Side Effects
RateADrug survey participants experienced less commonly reported side effects:
Effect on:NoneMildModerateStrongSevere
Diarrhea 66.7% 33.3% 0% 0% 0%
Reduced Libido 85.5% 3.6% 5.5% 5.5% 0%
Rapid Heartbeat 33.3% 33.3% 33.3% 0% 0%
Abdominal Pain 66.7% 33.3% 0% 0% 0%
Skin Inflammation 89.2% 3.3% 1.7% 2.5% 3.3%
Change in Behavior 57.1% 28.6% 14.3% 0% 0%
Muscle Fatigue 66.7% 0% 33.3% 0% 0%
Chest Pain 85.7% 14.3% 0% 0% 0%
Tingling Sensations 80% 9.2% 5.8% 2.5% 2.5%
Tremors 66.7% 33.3% 0% 0% 0%
Insomnia 66.7% 33.3% 0% 0% 0%
Change in Weight 28.6% 42.9% 14.3% 14.3% 0%
Flushing 57.1% 42.9% 0% 0% 0%
Nervousness 57.1% 42.9% 0% 0% 0%
Hair Loss 28.6% 42.9% 14.3% 14.3% 0%
Constipation 81.2% 6.2% 7.3% 2.1% 3.1%
Headache 74% 8.3% 9.4% 7.3% 1%
Increased Appetite 42.9% 42.9% 0% 14.3% 0%
Sweating 85.7% 14.3% 0% 0% 0%
Muscle / Joint Pain 76% 8.3% 4.1% 6.6% 5%
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Episodes since taking Synthroid
Since taking Synthroid Rate a Drug survey participants reported these episodes:
Auto Accident 2.8%
Fall 5.7%
Heart attack 0.6%
Hospitalization 4.5%
Seizure 1.1%
About these Results  
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User Comments about Synthroid
25 Jun 2015 ive been on synthroid for the past 10 years and the doctor and my levels were elevated so the doctor changed it to 100mg and ive been on it for 4 weeks and had my levels check yesterday and my levels checked and they are still elevated so she changed it to 150mg and I am just wandering if it is to much of an increase on the medicine in that short amount of time.
   —Posted by Anonymous
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29 Jul 2014 When I was diagnosed with Hashimoto's it was caught very early in blood work and I had no symptoms. I have been taking Synthroid over 25 years and never had any side effects. The dosage had to be adjusted a few times and I still have blood tests annually but all is good.
   —Posted by Citygirl
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24 Apr 2013 I dont feel nothing before, now im taking sythroid i have problems with my periods and have tenderness in breast (severe)
   —Posted by Anonymous
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30 Jul 2012 It seems to have disrupted the balance of my HPA axis. The measured result is very low cortisol.
   —Posted by Anonymous
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24 May 2012 I had to begin taking this medication as a result of Iodine treatment for hyperthyroidism.
   —Posted by Anonymous
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