Well that seems to be a fairly low dose, amphetamine addictions definately arn't cool though. Create your own pattern of use, whatever seems to work.
For example, you could do it once a week or on weekends, every other week, go on three day binges every month or so.
Drugs are all about individual reaction, you need to carefully monitor your usuage or set limits before you start using.
Dexedrine by the way is more potent as it is only the dextro isomer of amphetamine. Adderal is a mix of dextro and levo amphetamine, levo being considerably less potent.