In the last years increased the prescription of drugs in pediatry as pharmaceutical form of oral suspension. The same in commerce there are various producer that provide specific ready for use excipeints to make more easy to prepare OS in the galenic laboratory. Aim of this work is to verify the advantages of this pharmaceutical form to cover pediatrics dosages vs other form and also to overcome shortcomings of some crucial registered drugs. In this work are reported also scientific literature relates some ready for use product as bases- veicle for suspension and some formulations of interest.