Myotonic Dystrophy 1, also known as myotonic dystrophy type 1, is related to myotonic dystrophy and myotonic dystrophy 2, and has symptoms including excessive daytime somnolence and weakness. An important gene associated with Myotonic Dystrophy 1 is DMPK (DM1 Protein Kinase), and among its related pathways/superpathways is Adipogenesis. The drugs Lamotrigine and Dopamine have been mentioned in the context of this disorder. Affiliated tissues include skeletal muscle and eye, and related phenotypes are muscle weakness and distal muscle weakness