Hello Ram, Thanks for your query.
Since its been 20 years you had your last attack of seizure
and you have been on successful monodrug therapy, it is ideal to withdraw your drug. Long term eptoin/phenytoin
can cause gum hypertrophy, cerebellar ataxia
, hirsuitism and decrease in blood cells. The withdrawl has to done in a tapering dose fashion rightly guessed by you, to avoid withdrawl seizures which can happen with phenytoin. i suggest you continue your medication at 50mg for 2 weeks then alternate day for 2 weeks and then stop it totally.