What Are The Side Effects Of Dart?

Hi Dr. Matthew, I am 32 year old male. I get headache 2-3 times in a week. I tried many pain killer recommended by doctors but those doesn t help. Only Dart tablet give instant relief to my headache. However it has now become habit and i want to stop taking that medicine as i feel regular intake of this tablet might have side effects. Could you please suggest if there are any side effects of Dart tablet.