Rapid onset, vision-dependent effects

2. T+01:00:00 [intensity]

intensity 

++ PLUS TWO — Both the timing and the character are unmistakable, but you can still choose to let it stay in the background and carry on with ordinary activities.

3. T+00:00:00 [note]

The effects developed quickly, making writing and typing impossible before the first hour was out. Curiously, closing the eyes while lying down abolished all perceived effects, suggesting visual input was necessary to notice the drug at all. There was some jaw clenching but no eye wobble, and sleep that night was excellent.