respected sir my father is a post stroke patient(five years back in 2007).only his speech was affected that time.he recovered well.after that he got his first seizure .So they added anticonvalascents.The following tablets he was taking Metformin 500mg 1-0-1,envas5mg 0-1-0,Ecspirin 150mg0-1-0,eptoin100mg 1-0-2,gardenal30mg 0-0-2,he was stebilised with these drugs.But five months back he developed urticaria .he has been referred to a dermatologist and he started giving anti histamins(allegra,cetrizine, atarax ) along with some antibiotics(azithromycin) but inspite of that it was not subsiding so he started giving steroids(prednesolone 15mg).and reffered to neurologist to change both phenytoin and phenobarbitone.so they gave leveteracetam and suggested to tapper off phenytoin please give your valuble suggestion in this case