Modafinil half life?

Modafinil's elimination half-life is about 12–15 hours in healthy adults. It can vary widely (roughly 8–16 hours). Factors that can lengthen or shorten it include age, liver function, and other medications that affect metabolism. Because of this long half-life, dosing is usually in the morning to avoid sleep disturbance at night. If you want, I can tailor this to a specific age or health situation.