In standard preperation the quantity of medicament is full (thats is written on the outside of the wrapper that is also present in the tablet or capsule or in any preperation) while in the gendic preperation the quantity of medicament is not fulled (In this if out side of the wrap is written 20 mg. but in the actual preperation only 10 mg or 12 mg present) that is differance between the standard and gendic......