Since your body is undergoing such rapid change, side effects associated with dramatic weight loss are not uncommon.
Some known side effects of weight-loss surgery are constipation, diarrhea, nausea, poor absorption of nutrients, hair thinning or loss, low blood sugar levels, or post-surgical lactose intolerance.
Your doctor and nursing team will explain all of these side effects to you at discharge. Most patients can minimize these side effects by following all pre-operative and post-operative instructions.