Vicks is an American brand of over-the-counter medications owned by the American companies Procter & Gamble and Kaz Incorporated. Vicks manufactures NyQuil and its sister medication, DayQuil as well as other medications in the "Quil" line. Vicks also produces the Formula 44 brand of cough medicines, cough drops, Vicks VapoRub, and a number of inhaled breathing treatments. For much of its history, Vicks products were manufactured by the family-owned company Richardson-Vicks, Inc., based in Greensboro, North Carolina. Richardson-Vicks, Inc., was eventually sold to Procter & Gamble in 1985. Procter & Gamble divested the Vicks VapoSteam U.S. liquid inhalant business and sold it to Helen of Troy in 2015.

The Procter & Gamble Company (P&G) is an American multinational consumer goods corporation headquartered in Cincinnati, Ohio, founded in 1837 by William Procter and James Gamble. It specializes in a wide range of personal health/consumer health, personal care and hygiene products; these products are organized into several segments including beauty; grooming; health care; fabric and home care; and baby, feminine, and family care. Before the sale of Pringles to Kellogg's, its product portfolio also included food, snacks, and beverages. P&G is incorporated in Ohio.