想問下以下止敏感藥的功能與分別, 同時想問長期食會唔會有問題呢?

chlorpheniramine and hydroxyzine are 1st gen of anti-histamine
cetirzine is 2nd gen of anti-histamine

2nd gen of anti-histamine will have less side effect than 1 st gen of anti-histamine

here is the major side effect of chlorpheniramine and hydroxyzine
drowsiness, dizziness
• dry mouth
• headache
• loss of appetite
• stomach upset, nausea, vomiting, diarrhea or constipation

qualidrozine (hydroxyzine) 25mg tab係無類固醇!!