Hello bluejay52,
Technically the DWP say that you should notify them of any change of condition, however in reality they are only interested if your condition has improved.
Trying to put on an assessor's hat for a moment, I would ask has the major change to your prescribed drugs lessened the affect your condition has your Daily Living and Mobility. If the answer to that is that it has stayed the same or got worse then personally I would not bother to notify them. You are right it could trigger a review which would simply be a waste of everyone's time and energy.
But I must end with saying the wording the DWP use is that you should notify of them of any change in condition.... If you feel that this is the right route to go down, then, if it applies, I would include in my letter to them one from a medic saying that the impact of my condition on my Daily Living and Mobility has increased, and has not improved in any area.
Catherine
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
