My 66-year-old mother is currently on morphine. She takes approximately 100mg tablet a day. It’s mainly for her Rheumatoid Arthritis and she has been taking it for the last 6 months. What I’m wondering is, can this cause her to have short term memory or is it just part of aging? It’s just I’m noticing it more and more. Could this be the medication causing it? Can anyone advise me please...