Morphine
"Over 12 years I have been taking 240mg of Zomorph and tops up with Oramorph. All started when my neck collapsed and severed some nerves. Caused all sorts of trouble on my left side, numbness and chronic pain in shoulder, arm, thigh and groin. What was strange that it seemed to trigger all sorts of conditions, anaphylactic shock ( 4 times hospitalised, scary with my throat closing ), Type 2 Diabetes,  Kidney stones ( twice really bad, on-going ), Cellulitis, Leg went black, purple and is still painful after 18 months. My biggest problem is my short term memory is shot. I can look at a number with 4 digits and turn the page and it's gone it takes me around 3 or 4 turns of the page before I can write the number down."