"i was on phentermine. i lost 8 pounds because i also take effexor, topamax and clonidine for other symptoms. my insurance company considered this a trial. i, after three months, was no longer covered for the drug because i couldn&#039;t lose ten pounds because of my other conditions. i now am going through horrific withdrawals. i cannot sleep nor eat properly. i have to constantly drink something to produce saliva. i shake constantly and have nightmares from this medication. if you are on this medication, do not stop taking it!!! i learned the extremely hard way that this medication is addictive! my doctor told me the psychiatric effects are my mental illness not the medication! so, i advise anyone, do not take this with psychiatric meds!"