Yes, I started about two weeks ago.  Sometimes I have to remind myself to
eat.

AFAIK, it's a drug for seizure disorders that is now being used for
binge eating disorders after a couple of studies published last year
showing it effective for stopping binges.  But it's not really a
weight loss drug.

Health Canada put out a warning recommending periodic monitoring
of serum bicarbonate in the blood, because Topamax can sometimes
cause metabolic acidosis.

It's also being used for certain types of migraines.

A study using it only for weight loss was cut short because of very
high problems with side effects, with almost 20% of patients dropping
out of the study, although it did cause some loss.  Patients who
stayed in the study lost a average of 26 pounds in 60 to 72 weeks.

Considering that most people who seek diet medication do so because
they desire to lose *more* than the pound or so a week that they can
expect from dieting, I'd sayt that's pretty poor results for a drug
with high side effects that needs to be monitored with blood tests.

What's its Maintenance plan?  Without a Maintenance plan there
is an absolute guarantee of regain.  Regain it all and it
becomes irrelevant that you lost it in the first place, maybe
even worse than irrelevent.

Please try something that's a permanent change.  There is no
magic bullet.  If you want to permanently change your habits
plus try pills, err, okay.  Your body your science experiment.