Levothyroxine
Levoxyl is a brand-name medication containing levothyroxine sodium, a synthetic form of the thyroid hormone thyroxine (T4). It is primarily prescribed to treat hypothyroidism (underactive thyroid) and certain other thyroid conditions, helping to restore normal hormone levels in the body. This medication is typically taken orally and is intended for long-term use under medical supervision.
Levoxyl is a thyroid hormone replacement medication used to treat underactive thyroid (hypothyroidism) and related conditions.
Key facts at a glance
- RxNorm
- 218002
- Generic
- Levoxyl
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Levoxyl is used to treat hypothyroidism (underactive thyroid), certain types of goiter, and as supplemental therapy in thyroid cancer treatment. It may also be used in diagnostic tests of thyroid function.
Levoxyl contains levothyroxine sodium, a synthetic version of the naturally occurring thyroid hormone thyroxine (T4). It replaces or supplements the body's natural thyroid hormone to restore normal metabolic function.
Levoxyl should be taken on an empty stomach, typically 30-60 minutes before breakfast. Dosage must be individualized and monitored regularly through thyroid function tests. Inform your healthcare provider of all medications and supplements, as many substances can affect thyroid hormone absorption and effectiveness. Do not discontinue use without medical consultation.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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 July 26, 2026. · Read our editorial policy