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Thyrolar-1/4 Side Effects

Generic name: liotrix

Medically reviewed by Last updated on Apr 15, 2023.

Note: This document contains side effect information about liotrix. Some dosage forms listed on this page may not apply to the brand name Thyrolar-1/4.

Applies to liotrix: oral tablet.

Serious side effects of Thyrolar-1/4

Along with its needed effects, liotrix (the active ingredient contained in Thyrolar-1/4) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking liotrix:

Incidence not determined

Other side effects of Thyrolar-1/4

Some side effects of liotrix may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Incidence not determined

For Healthcare Professionals

Applies to liotrix: oral tablet.


Adverse reactions other than those attributable to hyperthyroidism due to therapeutic overdose are rare. Excessive doses may result in a hypermetabolic state resembling in every respect the condition of endogenous origin.[Ref]


Postmarketing reports: Hypothyroidism, thyroid stimulating hormone (TSH) increased, TSH decreased[Ref]


Postmarketing reports: Palpitation, blood pressure increased, heart rate increased[Ref]


Postmarketing reports: Alopecia, dry skin, urticaria, hyperhidrosis, pruritus[Ref]


Postmarketing reports: Hypersensitivity[Ref]


Postmarketing reports: Arthralgia, myalgia[Ref]


Postmarketing reports: Keratoconjunctivitis sicca[Ref]


Postmarketing reports: Fatigue, sluggishness, weight increased, asthenia, chest pain[Ref]

Nervous system

Postmarketing reports: Headache, tremor[Ref]


Postmarketing reports: Nausea[Ref]


Postmarketing reports: Anxiety, depression, insomnia[Ref]

More about Thyrolar-1/4 (liotrix)

Patient resources

Other brands


Related treatment guides


1. (2001) "Product Information. Thyrolar (liotrix)." Forest Pharmaceuticals

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.