Question: What is the published incidence of gingival hyperplasia due to the drug phenytoin?
Answer: The cited reference notes “The incidence rate of phenytoin-induced gingival over-growth ranges from 3% to 93%, but 50% of patients on long-term therapy are prone to develop gingival overgrowth.” (Chacko LN and Abraham S. Phenytoin induced gingival enlargement. 2014 BMJ case reports. 2014(1): 1136/bcr-2014-204670)
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