Usage of Acomplia may result in some side effects as a consequence of some bodily modifications. Following are some of the side effects caused. They are Stomach upset, muscle cramp, nausea, headache, dizziness. These Acomplia side effects can be overcome with continual use of this medication. In case, if these side effects persist for a longer period or become bothersome, take consent of the doctor immediately. Breast-feeding mothers, expectant women, women who aspire to become pregnant, diabetics and heart patients should avoid using Acomplia without proper medical consultation.