Main problem I see with Modafinil is that it's instant release. Whenever I hear that someone takes Adderall IR, I ask them if they've tried XR or Vyvanse since

Main problem I see with Modafinil is that it's instant release. Whenever I hear that someone takes Adderall IR, I ask them if they've tried XR or Vyvanse since the latter are superior in most ways. Mainly, IRs produce tolerance too fast and the curve is too steep. I don't think Modafinil has an XR solution. Though, Modafinil feels like a sugar pill compared to a low dose of amphetamine.