We aren't legally licensed to advise you about your prescribed medications.
This is one of those situations where the assistance of your own medical physician would be invaluable.
If possible, we recommend consulting with your physician and explaining what you're trying to do and requesting him/her help you carefully monitor and adjust your medication needs. That's the safest and most preferred way of tapering off medications.
It's important that your dosage requirements be closely monitored as changes can occur very rapidly. This is especially true with hypertension medications, metformin, and administered insulin.
It's critical to stress that you should never suddenly stop your medications (especially corticosteroids such as Prednisone and hormones such as insulin) as serious injury can result. Therefore, do NOT hesitate to seek professional assistance when wanting to taper off medications.