My son 12 months old who had history of febrile seizure presented with fever, doctor advices to give diazepam 2 mgalong with febrinil, is it safe?

Yes: Febrile seizures are generally a harmless event, even though they are very scary. There are not many things that can prevent them and because they are generally brief they do not need treatment. Sometimes if a febrile seizure is particularly long or happen frequently diazepam can help. It will make your child sleepy but otherwise has no side effects.

Febrile seizures: The seizures usually arise from rapid rise in temperature. If your young child is not acting right and he becomes feverish, give either tylenol (acetaminophen) or Ibuprofen and place him in a warm bath. By using this approach you may sometimes be able to abort a seizure.