What does it feel like when your ritalin (methylphenidate) or adderall wears off?

Varies a lot: Some people state they feel absolutely the same whether on or off a stimulant, even though others observe huge behavioral differences. Others definitely notice effects, good & bad, such as better attention and productivity as well as no appetite that fade as the medicine wears off. Still others have "rebound, " being irritable & even more symptomatic for awhile before returning to baseline.

Sleepier, sleepier: With shorter-acting stimulants, the symptoms that can occur when the half-life elapses can include: tiredness, irritability, acutely worsened concentration, and rarely sedation to point of outright sleepiness.