"Side Effects" is a song by American singer and songwriter Mariah Carey from her eleventh studio album, E=MC² (2008). It was written by Carey, Scott Storch, Crystal Johnson and the songs featured artist, Young Jeezy. It was inspired by Carey's marriage to record executive Tommy Mottola and his controlling nature over her and her career. Carey discusses how she still deals with the side effects of the experiences that she encountered during the relationship.