Decided to give selegiline/deprenyl a try for depression which I've had forever. One drop = 1 mg from the vendor I used. Their instructions for depression were 5 drops am and pm. Fortunately I started w/ one drop per day and added on drop every few days. Each increase made me feel a bit more 'pushed' and speedy. No decrease in depression but a marked increase in irritability.
Suddenly realized after a day at 5 drops in the am that I was frequently fighting the urge to slap someone or throw something/anything through a window or better still a wall. Hmmm. Guess more dopamine isn't what I need. YMMV