I don't know what to expect yet with Adderall. 10mg 2x per day.

I took at 8:30 this morning. Doc said take second dose in afternoon... not too late to avoid being up all night.

I waited until I felt like it might be wearing off.

What does it feel like? Is there a crash? I react very strongly to sugar. When I crash from sugar I get so tired that I can barely move. I have avoided sugar intake as much as possible for the sake of figuring out what I should/shouldn't experience with Adderall.

At 1:30 I started eating lunch. I have felt alert and awake all day so far and was quite happy with not having to deal with my usual bouts of fatigue that come with either stress... or sugar crash.

Immediately after lunch I started feeling fatigue. My eyes are very heavy. Was it the food or is dose 1 wearing?

I took the second dose. We'll see what happens. I'm still somewhat distractible today, but alert.

Did you have a high carb lunch?

The first day on any stimulant will cause many mixed reactions. you may feel the crash, but often in about a week you will see a signifigant difference. I am not sure if this is because you are aware of the reality of the crash, or it just does not occur. I felt the same exact way. I began this medication in July, and the first week was like a rollercoaster...upside down...with no safety bars!
It is all good now...as I hope you will get the same response.
Good luck!