i have been given k25phentermine by my doctor i was wondering is it safe for me to take i currently weigh is about 162 and my height is 55.i ma also curious is the dosage to low i have been looking up on the internet and it seems like i have been given a low dosage therefore will it be as effective to my body? and the price of the medication correct because my doctor charge $100 and this medication sell much cheaper on internet .and not to mention she sold it to me without a bottle no instruction she only told me to take one 2 hour before breakfast i have already stared to taking and have been for 5 days and i fill a little strange so what do you think