Your heart is not designed to be pushed by chemical substances, whether they are amphetamines (legal, I realize), cocaine (illicit use or abuse of medical grade cocaine used as a local anesthetic), caffeine, energy drinks, or otherwise.
The use of your medications, as prescribed, has relatively predictable side effects, the use of more than directed is never to be done. In addition, combining Adderall and/or Vyvanse with caffeine and/or energy drinks should not be done.