18th August 2020

A 62-year-old man attends his epilepsy review

A 62-year-old man attends his epilepsy review. He has been taking a stable dose of his current anti-epileptic medication for many years, and his most recent blood levels show this drug is within a therapeutic range. He has not had a seizure for over 18 months but is complaining of his gums feeling swollen and painful. 

For the case above, please select the SINGLE most likely drug that is being described. Select ONE option from the list above.