Hives (both Fluoxetine and Olanzapine cause rashes - this would be worse), Tardive Dyskinesia and very rarely the drug combination can cause a change in voice , an increase in libido (unlike virtually every psychiatric drug !) and Aphasia . Fluvoxamine ( Wiki ) Brand names: Dumirox®, Dumyrox®, Faverin®, Favoxil®, Fevarin®,