He might have a blood clot in his brain, which will inevitably burst sooner or later.
How has he not seen a doctor about this?
Jeff is the ideal conservative argument for free/subsidized healthcare not improving health outcomes. He'd be a particularly colorful anecdotal example for an anti-ACA candidate to use in a speech. The Welfare Queen of this century, if you will.
Do you doubt that his health would be even worse without the medication that he receives? The cocktail of pills he undoubtedly takes for high blood pressure, cholesterol, etc is almost certainly the only reason he's still around to entertain us.