They say you're supposed to. I wouldn't really know, I have to avoid the sun even without antipsychotics being involved because I am extremely pale first of all and second of all I have extensive scar tissue on both of my arms from wrist to shoulder and the last thing I want is to get those sunburned. I burn within half an hour in direct sunlight, time of year doesn't matter. So I'm always covered up when I'm outside, even during the summer... I hate suffocating in the heat but I have no choice.