There's Gold in Them Thar Pills

Samantha asks her mother to call a doctor for Darrin, who is in bed with a cold. Endora however summons not the Stephens' family doctor, but Dr. Bombay, a witch doctor, making his first appearance. Dr. Bombay gives Darrin some pills that instantly cure the common cold, after which he and Larry see big dollar signs, only to learn that the pills have an unusual delayed side effect on mortals.