If they are the brand name Spansules (the cap will be black and clear with orange balls inside of varying intensities of orange) it is very easy to defeat the time-release.
Since the Spansules are old school, they are simply wax shells surrounding 'balls' of pure d-amp. You'll want to:
1. *slightly* crush the balls (a quick job with a mortar and pestle will do nicely) - enough so that the balls break, but not so much that you're pulverizing the wax material making it homogenous with the d-amp inside.
2. place the whole damned mixture inside a tea strainer (a very fine-mesh wire screen used for sifting the essences of teas out without allowing plant material through)
3. What will result underneath (with some playful shaking) is pure dextroamphetamine powder. ALL of the wax will remain in the mesh screen. I used to do this all the time until it became a real health issue for me and I simply switched back to the Dexedrine IR's.
Anyway, that's how ya do it. Generic brands of the Spansules (I believe they are white and beige in color) are akin to contemporary Adderall XR; that is, the waxy time-release material is homogeneously combined with the d-amp, making separating the two impossible without some complex chemistry.
~ vaya