I agree Division but if it's his first time he should start small. Clen can be a little nasty (i.e. shaking, sweats, etc).
I usaully go with the following: 80mcg, 80mcg, 80mcg, 80mcg, 100mcg, 100mcg, 100mcg, 100mcg, 120mcg, 120mcg, 120mcg, 120mcg, 140mcg, & 140mcg.
After the fourteen days I stop for fourteen days & make some other "fat" burner.