I hope you are feeling better since your last post. I apologize for the delayed response.
Xyzal or levocetirizine
is in the anti-histamine class, similar to diphenhydramine (Benedryl), cetirizine (Zyrtec), desloratadine (Clarinex), fexofenadine (Allegra), and loratadine (Claritin). It helps treat allergy symptoms, such as itchy eyes and running nose, by blocking the action of histamines.
It is available as a 5 mg breakable (scored) tablets, so you can cut the tablet in half and take the 2.