ALAL, 太多藥廠啦,未聽過呢兩隻藥,但剛查過,兩隻都係 antihistamine,而Promegan係舊式會眼訓果隻,that's why 強劑量果隻要你夜晚食囉。
Xyzal: Generic name levocetirizine dihydrochloride. Levocetirizine is an antihistamine. It works by blocking a substance in the body called histamine. This helps to decrease allergy symptoms and hives.
PROMEGAN: A first-generation H1 antagonist, a phenothiazine derivative, Antihistamine,antiemetic,sedative.