The Horse in the Gray Flannel Suit (1968)

Frederick Bolton faces a dual challenge: his boss demands a marketing strategy for a new stomach pill, “Aspercel,” by tomorrow, while his daughter, Helen, dreams of owning a horse. A passionate equestrian, Helen excels in competitions, but Fred's finances can’t support her wish. In a bid to tackle both dilemmas, he hatches a plan to promote the pill by entering a horse named "Aspercel" in competitions with Helen as the rider. Success hinges on their ability to win, which could secure publicity for the product and fulfill Helen’s dream.