Did Bush have a seizure?

From Life and Deatherage:

The Likely Story posits that George W. Bush may have epilepsy, and that the disease or its medication may be responsible for several otherwise hard-to-explain Bush moments, including “the Pretzel Incident.” There’s some anecdotal evidence to support it, and Bush has never released his full medical records. Most people thought that was perhaps to hide his younger drug abuse, but maybe not…