This medication contains an antihistamine (cetirizine) and a decongestant (phenylephrine). For itching, the standard recommended adult dosage is usually one tablet daily, preferably at bedtime since it can cause drowsiness. While the antihistamine part is generally safe for daily use, taking this combination medicine on a regular, long-term basis is not recommended without a doctor's supervision. Continuous use of the decongestant component may lead to side effects like dryness or elevated blood pressure. For chronic itching, your doctor may suggest switching to a single-ingredient antihistamine, which is safer for long-term daily use. Please consult your physician for a tailored treatment plan.