Try any Vicks® NyQuil® and if you’re not completely satisfied with your Vicks NyQuil Original Liquid or Cherry Liquid purchase, Vicks will send you a full refund. To receive a refund from Vicks, click here for refund form and then mail the required materials. The offer is valid in U.S. only and limited to one refund per name, household, or address, through 6/30/2010. NOTE: Offer is ONLY valid if your request is postmarked within 30 days of purchase. Fulfillment by: Manufacturer. Expires: 6/30/2010.