Cerebral Creatine Deficiency Syndrome 1, also known as creatine transporter deficiency, is related to cerebral creatine deficiency syndrome 3 and cerebral creatine deficiency syndrome 2, and has symptoms including constipation, muscle spasticity and seizures. An important gene associated with Cerebral Creatine Deficiency Syndrome 1 is SLC6A8 (Solute Carrier Family 6 Member 8), and among its related pathways/superpathways are Metabolism and Regulation of expression of SLITs and ROBOs. The drugs Coal tar and Creatine have been mentioned in the context of this disorder. Affiliated tissues include brain and heart, and related phenotypes are intellectual disability and global developmental delay