Ingredients for Picnic Cetirizine Antihistamine Tablets, 24-Hour Allergy Relief, 30 CT

In the event antihistamines make you drowsy, consider taking cetirizine at bedtime so you'll wake up symptom-free. Cetirizine starts working within 30 minutes and reaches its peak within 2 to 3 hours of being taken. But, if you want it to do its best work, it's smart to take cetirizine preventatively before you experience any allergy symptoms at all. When taken ahead of exposure to your allergens, it can work proactively and prevent the release of histamine in response to allergens in the first Inactive Ingredients: Corn Starch, FD&C Blue No.1 Aluminum Lake, Hypromellose, Lactose Monohydrate, Magnesium Stearate, Polydextrose, Polyethylene Glycol, Povidone, Titanium Dioxide, Triacetin