Possible hypothyroidism associated with quetiapine.

Area of Science:

• Psychiatry
• Endocrinology
• Pharmacology

Background:

• Schizoaffective disorder treatment often involves atypical antipsychotics.
• Thyroid dysfunction can be influenced by various medications.
• Previous treatment for hyperthyroidism does not preclude future hypothyroidism.

Observation:

• A patient with a history of hyperthyroidism developed hypothyroidism after starting quetiapine.
• Elevated thyroid-stimulating hormone (TSH) levels were observed two months post-quetiapine initiation.
• The patient had been stable with no thyroid abnormalities prior to quetiapine treatment.

Findings:

• Quetiapine, an atypical antipsychotic, was associated with drug-induced hypothyroidism.
• Thyroid function normalized after initiating levothyroxine treatment.
• This case highlights a rare but potential adverse effect of quetiapine.

Implications:

• Patients with compromised thyroid function require careful monitoring when treated with quetiapine.
• Increased awareness of quetiapine's potential impact on thyroid function is necessary.
• Consideration of thyroid function tests during quetiapine therapy may be warranted.