This means that the chance of developing unwanted side effects, such as weight gain, may increase by adding Abilify to
Quetiapine. This
is not to say that an additional weight gain will occur, however there
is a risk. While these two drugs are both in the same class, they still are different drugs and some of the side effects do vary between them. For example, Quetiapine has been shown to be more sedating than Abilify.