Can you take loratadine and certrizine?

You shouldn't: Both medications are in the same class called non-sedating antihistamines and are effective for 24 hours. They should not be taken at the same time, but you can try both separately to see which is more effective for you.

Rarely, yes.: In certain situations of severe allergy such as chronic urticaria, recurrent anaphylaxis or mast cell activation disorders, it would be recommended to take higher than normal doses antihistamines. Be sure you are consulting with your physician if normal daily doses of antihistamines are not helping you.