I have found the perfect cure for anything. All thanks to Miriam and the above combination. Yes, you do stay awake for a while after but it does mean that the pain in my shoulder went away long enough for me to fall asleep and still be asleep when the alarm went off this morning.
This combination is also a known cure for unity problems in CU and boredom. Normally the result is lots of giggling.
Having been kindly reminded I have til Sunday, I'm very scared. My life could all go a little pear shaped, but I'm praying about it.