Michael Savage says so, here:
"Let's talk about Roberts. I'm going to tell you something that you're not going to hear anywhere else, that you must pay attention to. It's well known that Roberts, unfortunately for him, has suffered from epileptic seizures. Therefore he has been on medication. Therefore neurologists will tell you that medication used for seizure disorders, such as epilepsy, can introduce mental slowing, forgetfulness and other cognitive problems. And if you look at Roberts' writings you can see the cognitive dissociation in what he is saying."
