I am not sure what 'allergic reaction' your mother to the eptoin (phenytoin
) requiring the drug to be stopped and starting prednisolone
for the rash.
Phenytoin can cause a severe drug induced systemic reaction called Drug rash, Eosinophilia
, Systemic Symptoms (DRESS for short) where there is fever, big glands, skin peeling off and liver problems. Other drugs implicated in DRESS should ten be avoided. I am certain your mother did not have this...but maybe just a rash that can be itchy and known as urticaria
Prednisolone is occasionally used a last resort but antihistamines are more than effective in treating urticaria. The alternative antiepileptic is a good choice, and suggest you discuss with your Neurologist
in tapering and stopping the steroids after 5 days if the diagnosis was not DRESS.
I hope this was helpful.