Related Experiment Videos
Drug-induced hypothyroidism
Leonardo F L Rizzo1, Daniela L Mana1, Héctor A Serra2
1Dirección Médica Química Montpellier SA, Argentina.
Medicina
|October 19, 2017
Summary
Drug-induced thyroid dysfunction, primarily hypothyroidism, is a growing concern. Evaluating thyroid function before prescribing certain medications is crucial to prevent adverse effects and manage treatment interactions.
Area of Science:
- Endocrinology
- Pharmacology
- Internal Medicine
Background:
- The thyroid axis is susceptible to drug interactions, with an increasing number of medications affecting thyroid function.
- Drug-induced thyroid dysfunction, predominantly hypothyroidism, is a significant clinical issue.
- Understanding these interactions is vital for patient safety and effective treatment.
Purpose of the Study:
- To review the mechanisms of drug-induced thyroid dysfunction, including primary and central hypothyroidism.
- To highlight drugs that interfere with levothyroxine treatment.
- To emphasize the importance of pre-prescription thyroid function evaluation.
Main Methods:
- Literature review of drug-induced thyroid dysfunction.
- Analysis of mechanisms: hormone synthesis inhibition, immune responses, receptor blockade.
- Identification of drugs affecting thyroid hormone absorption, transport, and metabolism.
Main Results:
- Primary hypothyroidism mechanisms include synthesis inhibition, immune reactions (interferon, cytokines), and drug-induced thyroiditis (tyrosine kinase inhibitors, VEGF inhibitors).
- Central hypothyroidism can result from TSH inhibition (bexarotene, corticosteroids) or immunological effects (anti-CTLA4, anti-PD-1 antibodies).
- Levothyroxine efficacy can be compromised by drugs affecting its absorption, transport, or metabolism.
Conclusions:
- Pre-prescription thyroid function assessment is strongly recommended for drugs like amiodarone, lithium, interferon, and new biological therapies.
- Awareness of drug-endocrine interactions, particularly with thyroid function, is essential for clinicians.
- Proactive monitoring and management are necessary to mitigate risks associated with drug-induced thyroid dysfunction.