This morning I took my 37.5 mg pill of phentermine and also took my metabolife. I all of a sudden felt like I did the first day I took the medication. Clear head, EXTREMELY alert etc. I thought I may have accidentaly taken 2 phentermine until I looked on the counter and realized I took a metabolife instead of my vitamin. Anybody know if this is okay or if I should be going into the doc.... I feel just fine just hyper and alert.