Which finding is commonly associated with long-term phenytoin therapy?

Which finding is commonly associated with long-term phenytoin therapy?

• A. Hair loss
• B. Gingival hyperplasia
• C. Rash
• D. Tinnitus

Answer: (B)

Long-term phenytoin use is classically associated with gingival hyperplasia. This overgrowth happens because the drug stimulates gingival fibroblasts to produce more extracellular matrix, especially collagen, and may alter enzymes that remodel tissue. The result is thickened, fibrous gums that can envelope part of the teeth, particularly in the front of the mouth. Poor oral hygiene and younger patients increase the risk, and the hyperplasia often appears after months of therapy. Management focuses on reducing progression and improving quality of life: meticulous oral hygiene, regular dental cleanings, and, if possible, optimizing the phenytoin dose or switching to another antiepileptic. In some cases, folate supplementation or surgical reduction is considered for severe or persistent overgrowth. Other options are not as characteristically linked to long-term phenytoin therapy. For example, hair changes with phenytoin are more commonly hirsutism (excess facial/body hair) rather than hair loss; rash can occur but is not the hallmark finding of long-term use; tinnitus is not a typical or common association.

Long-term phenytoin use is classically associated with gingival hyperplasia. This overgrowth happens because the drug stimulates gingival fibroblasts to produce more extracellular matrix, especially collagen, and may alter enzymes that remodel tissue. The result is thickened, fibrous gums that can envelope part of the teeth, particularly in the front of the mouth. Poor oral hygiene and younger patients increase the risk, and the hyperplasia often appears after months of therapy.

Management focuses on reducing progression and improving quality of life: meticulous oral hygiene, regular dental cleanings, and, if possible, optimizing the phenytoin dose or switching to another antiepileptic. In some cases, folate supplementation or surgical reduction is considered for severe or persistent overgrowth.

Other options are not as characteristically linked to long-term phenytoin therapy. For example, hair changes with phenytoin are more commonly hirsutism (excess facial/body hair) rather than hair loss; rash can occur but is not the hallmark finding of long-term use; tinnitus is not a typical or common association.