[Randomized, open label study on the use of ranitidine at different doses for the management of weight gain associated with olanzapine administration].

Potential weight gain must be taken into account in the patient's comprehensive treatment approach when initiating antipsychotic treatment with Olanzapine. There are effective preventive and therapeutic pharmacological interventions to control this adverse effect. Not addressing this eventual treatment aspect of Olanzapine treatment may compromise the patient's health and his/her compliance with the pharmacological treatment indicated in serious psychiatric conditions.