The effects of Adderall start to work within 30 minutes. In contrast, Vyvanse takes approximately Nous-mêmes to two hours to take effect.Forms and Dosages Adderall IR is available in tablets ranging from 5 to 30 milligrams (mg). Adderall XR is available in six different mesure ranging from 5mg to 30mg. Vyvanse is available in capsules and chewabl