I’m driving Mum to the seaside for the weekend. She’s out of hospital and the fact that she’s no longer tied to heparin injections given by the district nurses means it’s easier to take her away. The downside is that the warfarin she is now taking is more difficult to organise and supervise. “The sea air will be good for you,” I say. But she’s unusually unenthusiastic, so low in energy and mood that I wonder if the hospital’s changes to her medication are affecting her badly.