Synthroid and Heart palpitations - from FDA reports


Heart palpitations is found among people who take Synthroid, especially for people who are female, 60+ old , have been taking the drug for < 1 month, also take medication Lasix, and have High blood pressure. This study is created by eHealthMe based on reports of 140,558 people who have side effects when taking Synthroid from FDA, and is updated regularly.

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On Aug, 20, 2018

140,558 people reported to have side effects when taking Synthroid.
Among them, 3,118 people (2.22%) have Heart palpitations


Number of reports submitted per year:

Could Synthroid cause Heart palpitations?

Time on Synthroid when people have Heart palpitations *:

  • < 1 month: 29.87 %
  • 1 - 6 months: 29.22 %
  • 6 - 12 months: 4.55 %
  • 1 - 2 years: 9.09 %
  • 2 - 5 years: 7.14 %
  • 5 - 10 years: 5.84 %
  • 10+ years: 14.29 %

Gender of people who have Heart palpitations when taking Synthroid *:

  • female: 89.58 %
  • male: 10.42 %

Age of people who have Heart palpitations when taking Synthroid *:

  • 0-1: 0.08 %
  • 2-9: 0.04 %
  • 10-19: 0.34 %
  • 20-29: 1.63 %
  • 30-39: 7.12 %
  • 40-49: 15.38 %
  • 50-59: 28.21 %
  • 60+: 47.19 %

Top conditions involved for these people *:

  1. High Blood Pressure: 214 people, 6.86%
  2. Osteoporosis (bones weak and more likely to break): 206 people, 6.61%
  3. Depression: 157 people, 5.04%
  4. High Blood Cholesterol: 150 people, 4.81%
  5. Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 111 people, 3.56%
  6. Stress And Anxiety: 107 people, 3.43%
  7. Asthma: 92 people, 2.95%
  8. Pain: 75 people, 2.41%
  9. Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 72 people, 2.31%
  10. Atrial Fibrillation/flutter (atrial fibrillation and flutter are abnormal heart rhythms in which the atria, or upper chambers of the heart, are out of sync with the ventricles): 69 people, 2.21%
Check whether a drug or a condition causes Heart palpitations

Top co-used drugs for these people *:

  1. Lasix: 257 people, 8.24%
  2. Lipitor: 243 people, 7.79%
  3. Premarin: 239 people, 7.67%
  4. Aspirin: 238 people, 7.63%
  5. Fosamax: 199 people, 6.38%
  6. Prilosec: 173 people, 5.55%
  7. Vioxx: 164 people, 5.26%
  8. Xanax: 164 people, 5.26%
  9. Nexium: 157 people, 5.04%
  10. Prevacid: 156 people, 5.00%
Subscribe to monitor Heart palpitations in Synthroid

Top other side effects for these people *:

  1. Chest Pain: 728 people, 23.35%
  2. Fatigue (feeling of tiredness): 616 people, 19.76%
  3. Dizziness: 603 people, 19.34%
  4. Nausea (feeling of having an urge to vomit): 590 people, 18.92%
  5. Breathing Difficulty: 556 people, 17.83%
  6. Stress And Anxiety: 533 people, 17.09%
  7. High Blood Pressure: 527 people, 16.90%
  8. Weakness: 501 people, 16.07%
  9. Headache (pain in head): 491 people, 15.75%
  10. Insomnia (sleeplessness): 363 people, 11.64%
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* Approximation only. Some reports may have incomplete information.

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Related studies

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Synthroid has active ingredients of levothyroxine sodium. It is often used in hypothyroidism. (latest outcomes from Synthroid 149,665 users)

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NOTE: The study is based on active ingredients and brand name. Other drugs that have the same active ingredients (e.g. generic drugs) are NOT considered.

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