Is levothyroxine 100 mg, the same as synthroid 0.1mg ?

No, it would be Levothyroxine 100 mcg is the same as Synthroid 0.1mg.

Levothyroxine sodium is a prescription thyroid medication. It is actually a synthetic version of a naturally occurring thyroid hormone. Levothyroxine is approved to treat an underactive thyroid (known medically as hypothyroidism). It is also approved for the treatment of a variety of other thyroid problems, including certain types of thyroid cancer.

Levothyroxine tablets come in the following strengths:

Levothyroxine 25 mcg
Levothyroxine 50 mcg
Levothyroxine 75 mcg
Levothyroxine 88 mcg
Levothyroxine 100 mcg
Levothyroxine 112 mcg
Levothyroxine 125 mcg
Levothyroxine 137 mcg
Levothyroxine 150 mcg
Levothyroxine 175 mcg
Levothyroxine 200 mcg
Levothyroxine 300 mcg.

Levothyroxine soft gelatin capsules are available in the following strengths:

Levothyroxine 13 mcg
Levothyroxine 25 mcg
Levothyroxine 50 mcg
Levothyroxine 75 mcg
Levothyroxine 88 mcg
Levothyroxine 100 mcg
Levothyroxine 112 mcg
Levothyroxine 125 mcg
Levothyroxine 137 mcg
Levothyroxine 150 mcg.

Sometimes, the strengths are given in milligrams (mg) instead of micrograms (mcg), which can be confusing. Because there are 1000 mcg in every mg, levothyroxine 100 mcg is the same thing as levothyroxine 0.1 mg.

Synthroid is the brand name of levothyroxine sodium.

Synthroid tablets come in the following strengths (the colors of the tablets are in parentheses):

25 mcg (orange)
50 mcg (white)
88 mcg (olive)
100 mcg (yellow)
112 mcg (rose)
125 mcg (brown)
137 mcg (turquoise)
150 mcg (blue)
175 mcg (lilac)
200 mcg (pink)
300 mcg (green).

Sometimes, the strengths of Synthroid are given in milligrams (mg) instead of micrograms (mcg), which can be confusing. Because there are 1,000 mcg in every mg, Synthroid 100 mcg is the same thing as Synthroid 0.1 mg.