Is Adderall to blame for Marco Rubio’s odd behavior during his campaign?

Breitbart, not a site I’d normally link to, but.  Constant water-drinking during debates, repeating sentences, and yes, consuming a pill in public, all point to something off-kilter about Rubio.  Not that he had the pill addiction of a JFK, though, or his own personal Dr. Feelgood, as Kennedy did.