I agree with @LadyShadow -- you're doing very well @Tart Cherry Jam!

I was wondering how long the Dextroamphetamine might last in one's body. Half-life is .... "10 hours (for d-amphetamine) or 13 hours (for l-amphetamine)." So about 3/4 of it is eliminated in a day, and the stuff would build up gradually. Skipping a dose or taking a half pill every week seems like a good approach. But I am not a doctor -- just a smart aleck.

I used to skip a dose of Nuvigil on the weekends when I first started it. But now I just keep it going.