You don't have to be on medication to keep your PIP or ADP. The only issue the authorities would be interested in - is whether your condition has improved. That is not what you're saying - you are just looking for different solutions. You will need to explain the change when you come to a review, as many assessors are obsessed with what medication people take (even though they shouldn't be) and tend to think if people aren't taking lots of tablets, they don't have any problems.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems