"i started taking phentermine 5 weeks ago, at 5&#039; 10 weighing 246lbs. after having two children and not being able to lose any weight i went to my doctor after researching this medication.  he prescribed 30 mg caps to be taken daily for 30 days.  then i just had to go and get weighed to pick up the next prescription.  he is giving it to me for only 3 months.  as of today, i have lost 22 lbs.  i had horrible but tolerable dry mouth for the first 3 weeks but now it&#039;s completely gone.  i have no other side effects.  i don&#039;t feel overly energized, like on speed or anything, just enough to get me through the day without feeling the need to nap! i also feel like i don&#039;t need 9-10 hours of sleep each night to feel rested like before."