i see no reason why you cannot take your multivitamin and b12 but you should always share what you are taking (drugs/supplements/herbal remedies) with your doctor. here you can see more about precautions and interactions when taking adipex-p.
can i take a multi vitamin with adipex-p. i have been taking a multi-vitamin and b-12 for a while now and the dr just recently put my on adipex-p for my weight loss can i still take my vitamins?