Modvigil and Fat Loss. It is known that Modvigil assists in weight reduction by increasing serotonin levels in the mind. It is vital to take Modvigil frequently so that you can take advantage of its weight loss effects. A typical dosage of Modvigil contains 200 mg of Modvigil and 250 mg of bupropion. These are often taken together. It is suggested to simply take this medicine just on advice...