My dog took too much seizure meds: stupor, drooling. What to do?

Sorry to hear about Tobie. I am wondering if Potassium Bromide is the only drug he is currently using for Seizure activity. I ask because it is not typically a first line of defense sort of medication that we choose any more for these conditions, due to level of effectiveness and side effect profile. If he is not used to this type of medication, an increased dose can definitely result in some unwanted side effects. Since you gave it a while ago already, there is not much you can do for him in terms of getting it out of his system forcibly, other than letting nature run its course. However, he may benefit from supportive care in a hospital setting if you feel his symptoms are very concerning. Personally, I would not allow him to continue walking freely around the house right now in case he accidentally injures himself. Once he is out of this stupor, he can be unconfined. If this sort of behavior is continuing after another 12-24 hours, he should definitely be seen to determine if this is his disease process worsening. In terms of diarrhea, this could have been due to stress, the medication, or general GI upset from countless other reasons. One episode of diarrhea is not something of significant concern. Hope this answers you question.