Hypothyroidism
Hypothyroidism, also called an underactive thyroid, happens when the thyroid gland makes too little thyroid hormone. This can slow many body functions and affect how a person feels.
Levothroid
25mcg · 50mcg · 75mcg · 100mcg · 112mcg · 125mcg · 200mcg
Levothyroxine tablets for hypothyroidism and to suppress thyroid-stimulating hormone. They replace the missing thyroid hormone.
Key points
- Symptoms can include tiredness, feeling cold, constipation and changes in thinking, though they vary between people.
- Causes of hypothyroidism differ and can include problems affecting the thyroid gland.
- Thyroid hormone replacement may be used to address low hormone levels.
Medicines listed for hypothyroidism
The listed products contain levothyroxine and liothyronine, which are thyroid hormone ingredients. Synthroid and Levothroid contain Levothyroxine and Cytomel contains Liothyronine. All three listed products are tablets.
Further reading
Related articles
29 Jul 2026 ⋅ 8 min read
Thyroid Problems: Why the Symptoms Are So Easy to Explain Away
An underactive thyroid causes tiredness, weight gain and feeling cold, symptoms mild enough to attribute to almost anything. What the blood tests measure, why levothyroxine is usually lifelong, and why the dose needs checking.
Read guide