One dose of AllerClear® works for a full 24 hours. Kirkland Signature Non-Drowsy AllerClear Antihistamine 10mg 365 Tablets EXP 12/2022Condition is "New". About Kirkland Signature AllerClear®. AllerClear® is approved to temporarily relieve indoor and outdoor allergy symptoms in adults and children 6 years and over.
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