What Are The Side Effects Of Lexopeg When Taken For Long Time?

Hi...my daughter is 17 months old and she is having severe constipation ...it started after she left lactogen and switched to normal milk...its been six months now and she takes half pouch laxopeg everyday...her diet is very good...she takes almost 4 meals a day in gud quantity which includes porrige, cereals, fruits, vegetable....she takes lots of papaya n guvava too but that too doesnt help...her water intake is also good....have tried everything including raisins, prunes, dates etc but still her potty becomes so hard if we dont give her lexopeg....is there any side effects of lexopeg as its been almost 6 months she is taking the same?? Can we use anema instead of it? Please advice Rgards, Rti