i am a 17 y/o girl who was put on this medicine to stop continual...

i am a 17 y/o girl who was put on this medicine to stop continually vomitting and nausea. i have been on it for around 4 weeks now, my vomitting has lightened up a bit (previously it was 10+ times a day, now its down to less than 5), but i have experienced, horrible diarriah, excessive tiredness, muscle stiffness and aches, and coldness. i have also experienced loss of appetite with about a 10lb weight loss so far, that which i am not complaining about, because during the years i was constanly vomitting, i actually gained close to 35lbs, and i have another condition that causes me not to be able to lose weight. so i am debating wether or not the bad side effects out weigh the good.