Let me add to MrsD's comments. Yes, this is a very hot and expanding topic right now. There is, in fact, other programs for testing of medications, but these are typically limited to checking whether the patient can properly metabolize the medication (and if yes, then it can be assumed they can benefit from the medication). The program by Proove Bioscience for pain medications (and anti-depressants) does this, but also goes a big step further. It tests at the receptor level and therefore can predict the response by the patient. This makes a huge difference in prescribing pain medications...when needing to know whether it is 'likely' to help is a key factor.