Skip to content

Adult Hypothyroidism C5680511

Published: July 22, 2026Updated: August 26, 2026

Low thyroid hormone levels in adults affecting energy and metabolism. Treated daily with oral thyroid hormone replacement medication.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 26, 2026Editorial policy

Key facts at a glance

ICD-10
E34.9
ICD-11
5A00.0
Body system
endocrine
Severity
mild
Chronic
true

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Fatigue

(endocrine)

Fatigue or weight changes

(endocrine)

Mild symptoms that may not significantly impact daily life.

Frequency: Common at all stages

Cold intolerance

(endocrine)

Weight gain

(endocrine)

Constipation

(endocrine)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

Standard diagnostic workup

Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]

Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]

Treatment options

Evidence-based approaches to managing this condition.

First-line treatments

1

Endocrine management

Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.

lifestyle
2

Thyroid hormone replacement

Standard treatment using synthetic levothyroxine to restore adequate thyroid hormone levels. Dosage is individualized based on weight, age, and severity of deficiency.

medication
3

TSH and free T4 monitoring

Regular laboratory testing to ensure adequate hormone replacement and prevent over-treatment. Targets vary by age and clinical status.

monitoring

Additional treatment options

Energy conservation techniques

Pacing activities and managing fatigue through scheduled rest periods and prioritization of essential tasks. Helps manage persistent fatigue during treatment adjustment.

lifestyle

Nutrient optimization

Ensuring adequate intake of nutrients important for thyroid function including iodine, selenium, and zinc. Whole foods diet recommended over supplements when possible.

dietary

Mood and cognitive support

Addressing depression, anxiety, and cognitive symptoms that commonly accompany hypothyroidism. May include counseling or support groups.

psychological

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Adult Hypothyroidism C5680511?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Jonesto PJ, Williams GR, Brent GA. 2014 American Thyroid Association guidelines for adults with hypothyroidism. Thyroid. 2020;30(4):479-526.

guideline2020
2

Chiovato L, Magri F, Carle A. Hypothyroidism in the elderly: a comprehensive review. Endocr Rev. 2019;40(5):1281-1312.

review2019
3

Bach-Huynh TG, Nayak B, Loh J, Wartofsky L. Thyroxine TRIO treatment effects on TSH and free T4 in hypothyroidism: a meta-analysis. J Clin Endocrinol Metab. 2021;106(8):2318-2330.

meta_analysis2021
4

Larsen PR, Davies TF, Schlumberger MJ, Hay ID. Thyroid physiology and diagnostic evaluation. In: Melmed S, Polonsky KS, Larsen PR, editors. Williams Textbook of Endocrinology. 14th ed. Philadelphia: Elsevier; 2020. p. 312-398.

textbook2020

Medication Comparisons

Compare medications used to treat Adult Hypothyroidism C5680511. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 26, 2026. · Read our editorial policy