8 doctors weighed in:

What are the common side effects of synthroid (thyroxine)?

8 doctors weighed in
Dr. Latisha Smith
Wound care
2 doctors agree

In brief: There are none

Synthroid (thyroxine) is a man-made replacement for your own thryroid hormone.
There are no side effects per se because the drug will bind to the same receptors that your thyroid hormone binds to so the body does not use the drug as a synthetic. It is possible to take too much Synthroid (thyroxine) and then have effects of excess thyroid like rapid heart beat.

In brief: There are none

Synthroid (thyroxine) is a man-made replacement for your own thryroid hormone.
There are no side effects per se because the drug will bind to the same receptors that your thyroid hormone binds to so the body does not use the drug as a synthetic. It is possible to take too much Synthroid (thyroxine) and then have effects of excess thyroid like rapid heart beat.
Dr. Latisha Smith
Dr. Latisha Smith
Thank
Dr. (Liz)Phuong Tran
Family Medicine
1 doctor agrees

In brief: Not usually

Most pts do not have symptoms but ones can hasve side effects such as heart palpitation, rapid heart rate, chest pain, anxiety, insomnia, emotional changes.

In brief: Not usually

Most pts do not have symptoms but ones can hasve side effects such as heart palpitation, rapid heart rate, chest pain, anxiety, insomnia, emotional changes.
Dr. (Liz)Phuong Tran
Dr. (Liz)Phuong Tran
Thank
Dr. Scott Monheit
General Practice

In brief: Hot, anxious

Synthroid (thyroxine) the thyroid hormone synthetic form, i like to think as the metabolism hormone.
Too much would cause a raise in heart rate, feeling of being hot, anxiety, difficulty sleeping, and weight loss.

In brief: Hot, anxious

Synthroid (thyroxine) the thyroid hormone synthetic form, i like to think as the metabolism hormone.
Too much would cause a raise in heart rate, feeling of being hot, anxiety, difficulty sleeping, and weight loss.
Dr. Scott Monheit
Dr. Scott Monheit
Thank
Dr. James Stahl
Internal Medicine

In brief: Same as thyroid

Too much synthroid (thyroxine) will give you the same effect of having an over active thyroid - temperature intolerance, , tachycardia, weight loss, diarrhea are among common signs of excess.

In brief: Same as thyroid

Too much synthroid (thyroxine) will give you the same effect of having an over active thyroid - temperature intolerance, , tachycardia, weight loss, diarrhea are among common signs of excess.
Dr. James Stahl
Dr. James Stahl
Thank
Dr. Paul L. Hester
General Practice

In brief: High thyroid

The overdosage or overuse of synthroid (thyroxine) may cause symptoms including anxiety, increased heart rate, hair loss, moist skin and other symptoms associated with high thyroid levels.
Synthroid (thyroxine) must be converted to active thyroid by the body, so it is often well tolerated and dosage adjustments can be accomplished without significant side effects.

In brief: High thyroid

The overdosage or overuse of synthroid (thyroxine) may cause symptoms including anxiety, increased heart rate, hair loss, moist skin and other symptoms associated with high thyroid levels.
Synthroid (thyroxine) must be converted to active thyroid by the body, so it is often well tolerated and dosage adjustments can be accomplished without significant side effects.
Dr. Paul L. Hester
Dr. Paul L. Hester
Thank
Get help from a real doctor now
Dr. Tonga Nfor
Board Certified, Internal Medicine - Cardiology
12 years in practice
508K people helped
Continue
108,000 doctors available
Read more answers from doctors