Wait... let me see if I have this straight.

Her BP dropped so perhaps she can stop or cut down on the BP meds.

Perhaps she can cut down or quit her insulin.

And the doctor doesn't want her to continue to follow the diet that allowed this wonderful change to happen, so she can continue to take her medications?

Whee! Time for a new doctor, methinks.

As far as consulting a doctor when you go on a diet, the reception that the Atkins diet gets from most doctors, it is no wonder that people don't tell their doctors!