My 2.5 years daughter suffers from severe pain in legs(both right and left). she screams continuously and doesn't sleep whole night , the day she has the pain. It starTs mostly in the night. She is not very active while in the garden. Nothing cures her pain. Then a DOCTOR ADVISED US TO GIVE HER 2.5 ML IBUGESIC. IS IT SAFE AS PAIN KILLER? sHE SOMETIMES HAS THIS PAIN TWICE A WEAK. I am worried about its long term effect..