Dose - How much Adderall IR should I start with for plugging?

[WhtRabbit]

Swim's been taking ADD meds for more than 5 years and specifically Vyvanse 50mg for the past year. Swim, in pursuit of a nice high, will take anywhere from 2 to 3 pills a day until they run out then take a break until it's time for a new script.

As 2009 rolled around, Swim's insurance changed and Vyvanse went from $20 to $60. I told swim to ask for a different med, one that could be bought in generic form to save money. Plus, swim's tolerance was peaking.

Swim's doc gave her Adderall IR 15mg twice daily to start. She's interested in snorting and plugging this instance release form of amp. She tried snorting yesterday as soon as she got home. Broke a pill in half, crushed it up and snorted. Sadly, there was no noticeable effect. Plus orange goo was irritating.

To the point... Keistering Adderall IR. Swim's been doing coke on and off for a couple of months. Tolerance well acheived and she's taking a break. She's done coke mixed with a little water this way and reached bliss... until the dreaded tolerance. Do you do the Adderall IR the same? Crush up and mix in a needleless syringe with about 3ml of water? Considering swim's tolerance and length of time on ADD meds, what would be a good starting dose to keister?