What is Generic Meridia ? Generic Meridia is indicated for the management of obesity, including weight loss and maintenance of weight loss, and should be used in conjunction with a reduced calorie diet. Generic Meridia is recommended for obese patients with an initial body mass index > 30 kg/m2 or > 27 kg/m2 in the presence of other risk factors (e.g. hypertension, diabetes, dyslipidemia). Body mass index is calculated by taking the patient`s weight, in kg, and dividing by the square of the height of the patient, in metres.