I started on vyvanse 30mg about a month ago. It is working well but it wears off around 5 or 6 pm. My doctor prescribed me another 10mg to take at some point in the afternoon. Does anyone that takes a second dose have any suggestions? I usually take the first one between 7:30 and 8:30 and then I feel it wearing off around 5 or 6. If you're on a second dose can you let me know what you do and how it works for you?