Complex sentence: Propane is nontoxic; however, when abused as an inhalant, it poses several risks: sudden cardiac arrest, sudden sniffing death syndrome, Cardiac arrhythmia, loss of inhibitions and brain damage from long term use.
Split into simpler sentences: Propane is nontoxic; however, when abused as an inhalant, it poses several risks. Sudden cardiac arrest, sudden sniffing death syndrome, Cardiac arrhythmia, loss of inhibitions and Brain damage from long term use.