I am on 15mg Olanzapine once a night. Then I started 150mg Wellbutrin sr once a day in the morning. However, the Wellbutrin has had little effect. Also no constipation or weight loss as side effects.

Though in the past I have been on 10mg olanzapine and 100mg Wellbutrin and I lost weight and became constipated, which a side effect of Wellbutrin.

is the olanzapine contradicting the Wellbutrin and not letting it take effect?
Do you have any experience?