Are there differences in the duration of action between different antihistamines?

Nov 28, 2018 ... While patients have reported that cetirizine hydrochloride works faster, loratadine lasts longer. Products with the ingredients state to be ... Kirkland Signature Aller-Tec, 365 Tablets Compare to Zyrtec® Active IngredientCetirizine HCL/Antihistamine 10 mg.Indoor/Outdoor Allergy Relief. Xyzal (levocetirizine) and Zyrtec (cetirizine) are both oral antihistamines that work for 24 hours and are available over-the-counter. ZYRTEC syrup is a colorless to slightly yellow syrup containing cetirizine hydrochloride at a concentration of 1 mg/mL (5 mg/5 mL) for oral administration ... Cetirizine is an antihistamine medicine 1 used to relieve allergy symptoms caused by hay fever and hives 2 . It's also a non-drowsy antihistamine for most ... Cetirizine - Brand names: Allacan, Benadryl Allergy, Piriteze Allergy, Zirtek Allergy. Find out how cetirizine treats symptoms of allergies and how to take it. Cetirizine (Zyrtec) ¼ – ½ mg per pound (one 10mg tab per 30-40 lbs) twice daily. Loratadine (Claritin): ¼ mg per pound (half of a 10mg tablet per 20 lbs) ... Cetirizine (Zyrtec) Dose Table. Back to Dosage Tables. When to Use. Treatment of nasal or eye allergies, hives, itching and other allergic symptoms. That said, Zyrtec is a fast-acting drug that starts to work in less than an hour the first time you take it. Cetirizine hydrochloride is also a fast-acting ... Overview. Zyrtec and associated names, 10 mg film coated tablets, 10 mg/ml oral drops, 1 mg/ml oral solution, is an anti-allergic drug indicated for the relief ...