Is It Safe To Have Eliwel For Severe Headache?

Hi,I am a 21 year male ,,having headache for more than two weeks...consulted the doctor but they said no migrain...and recommend me eliwel(10)mg..........i am little bit curious about it...should i take themedicine or not...also for my headache i am very much concerned that might be i am having brain tumor...but no one of doctor had asked me to do a ct-scan...........pls help