Amitriptyline Hydrochloride and weight gain

I'm 14 and i have been taking this medication (25 mg every evening) for a little over a year now. I have been taking it to help with migraines, ice pick migraines. I have to say it is very suprising to hear all of these side effects. I haven't had one. It has completely rid me of all headaches without weight gain or keeping me drowsy all day. A positive addition to my headaches gone it has helped me sleep somewhat sounder throught the night.

amitript==this can cause the chemisrty in your brain change -i look up in PDR=YEARS AGO WHEN I TOOK THIS DRUG-I ALSO GAINED WEIGHT-READ IN THE PDR--ABOUT THIS-I TOOK THIS FOR YEAR-WENT FF OF IT ON MY OWN-WITHIN 6 MONTHS I WAS DIAGNOSE WITH A CHEMICAL INBALCE,,I DONT KNOW IF IT WAS BECAUSE I WENT OFF OF COLD=U HAVE TO SLOWLY GET OFF THIS MEDICINE KSWISS

I just wanted to let people know that for one person the "side effects" can and will be totally different than another's.
I have been taking 100 mg daily for years. The only noticed side effect for me is dry mouth, dry skin and can getting sun burned easily. NO weight gain or heart burn/palputations.

I most notice grogginess in the AM if I don't take the PM dose early enough (need to take around 5:00). Also, I tend to feel cold much more often (usually I'm hot). I experienced weight gain as well, but I'm not sure I can attribute that to this medication... :-(