abilify bipolar disorder

Phentermine is sure someone on medication for bipolar disorder?
I'm healthy and happy now, except for being moderately obese. I am 212 and 5 10. Size 16. I want to lose weight and have tried everything from hunger to be an exercise nut and NOTHING is helping. My sister took phentermine and is now a size 4. I take it too, but because I am afraid I have ABILIFY. I can not find any information on drug interactions, either for the name of each drug others as in conflict, but wondered if anyone has any additional information Thanks in advance for serious answers polite.
MIX NO MEDS see the doctor before doing this could be dangerous
I am now off of abilify for good