text_1: It is safe to take 20mg of Zyrtec (cetirizine) daily? I take it in the morning but 12 hrs later I am suffering. If I don't take another one at night I dont sleep.
text_2: My mother is on Zyretc( Cetrizine) 20 mg once daily. She mentioned of feeling sleepy all the time. Is it safe to stop the medication? 