Can I Take Zyrtec, Pills for Allergy, While Taking Accutane?

Hello, I am on Accutane treatment for 4 months now and so far it has gone well (i had slight mood swings and sometimes blurred vision but nothing serious, i went to the doctor and we sorted it out). I also have allergy problems and have been taking vaccine for them and i sometimes use Loratadine when they get bad but the pills are not strong enough. My doctor approved the vaccine but hasn't told me about the allergy pills. Zyrtec always helped but i am afraid to use it now. Best Regards, Ana