text_1: What is causing his insomnia?  He went to the tertiary center and was told he had restless legs but he didn't respond at all to clonazepam.  All his life he is awake from 12 midnight to 4 AM.  Sleeps from 10 to 12 and 4 to 6 and takes 30 min nap in the daytime.
text_2: What is causing his insomnia? Tertiary center said restless legs but no response to clonazepam.