Risperdal lawsuits alleging that the drug caused boys and male adolescents to grow breasts date back as early as 2010. The lawsuits argue that the drug caused boys to grow breasts as large as 38D after being given the drug to treat symptoms of schizophrenia and attention deficit hyperactive disorder (ADHD).
Risperdal manufacturer Janssen Pharmaceuticals and parent company Johnson & Johnson currently face hundreds of similar Risperdal lawsuits alleging that the drug caused gynecomastia, or breast tissue growth, in males. The companies reportedly knew as early as 2006 that the drug could cause breast growth in boys who took Risperdal.
Risperdal has been found to increase levels of a hormone known as prolactin for an indefinite period of time. The increased prolactin levels often lead to breast tissue development, a condition which can only be remedied through surgery or other medical procedures.