welcome to HCM,
THIS IS DR.SIVAYOGI,
it seems the doctor you have consulted diagnosed your problemcorrectly.. most of the times patients with costocondritis will experience pain for even months , the medicine you are using now contains (aceclofenac+paracetamol
).. this will be sufficient and there is no higher pain killer than this, if you use excessive dose you will get gastritis
and peptic ulcer
as a side effect..so be patient ..and if u want further releif consult a PHYSIOTHERAPIST ..and do physiotherapy
regularly , avoid lifting of weights ...
hope this will help u ..