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Review: could Synthroid cause High blood pressure?

Summary: High blood pressure is found among people who take Synthroid, especially for people who are female, 60+ old, also take medication Vioxx, and have Hypothyroidism.

We study 88,994 people who have side effects while taking Synthroid from FDA and social media. Among them, 4,297 have High blood pressure. Find out below who they are, when they have High blood pressure and more.

You are not alone: join a support group for people who take Synthroid and have High blood pressure >>>



Synthroid has active ingredients of levothyroxine sodium. It is often used in hypothyroidism. (latest outcomes from 93,849 Synthroid users)

High blood pressure

High blood pressure has been reported by people with osteoporosis, depression, multiple sclerosis, pain, rheumatoid arthritis. (latest reports from 329,841 High blood pressure patients)

On Mar, 26, 2015: 88,994 people reported to have side effects when taking Synthroid. Among them, 4,297 people (4.83%) have High Blood Pressure.

Trend of High blood pressure in Synthroid reports

Time on Synthroid when people have High blood pressure * :

< 1 month1 - 6 months6 - 12 months1 - 2 years2 - 5 years5 - 10 years10+ years
High blood pressure14.78%11.82%7.39%7.88%16.26%14.78%27.09%

Gender of people who have High blood pressure when taking Synthroid * :

High blood pressure85.97%14.03%

Age of people who have High blood pressure when taking Synthroid * :

High blood pressure0.03%0.18%0.35%0.58%2.68%11.04%25.04%60.11%

Severity of High blood pressure when taking Synthroid ** :

leastmoderateseveremost severe
High blood pressure4.08%67.35%28.57%0.00%

How people recovered from High blood pressure ** :

while on the drugafter off the drugnot yet
High blood pressure9.09%27.27%63.64%

Top conditions involved for these people * :

  1. Hypothyroidism (738 people, 17.17%)
  2. Osteoporosis (555 people, 12.92%)
  3. Hypertension (536 people, 12.47%)
  4. Thyroid disorder (352 people, 8.19%)
  5. Depression (314 people, 7.31%)

Top co-used drugs for these people * :

  1. Vioxx (734 people, 17.08%)
  2. Aspirin (726 people, 16.90%)
  3. Fosamax (606 people, 14.10%)
  4. Lasix (575 people, 13.38%)
  5. Lipitor (480 people, 11.17%)

* Approximation only. Some reports may have incomplete information.

** Reports from social media are used.

How to use the study: print a copy of the study and bring it to your health teams to ensure drug risks and benefits are fully discussed and understood.

Get connected: join our support group of synthroid and high blood pressure on

Do you have High Blood Pressure while taking Synthroid?




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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.

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only, and has not been supported by scientific studies or clinical trials unless otherwise stated. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

You may report adverse side effects to the FDA at or 1-800-FDA-1088 (1-800-332-1088).

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.


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