Biophosphanates and ADR or fusion

[sahuaro]

Maria recently posted a wonderful review article about treatments for osteopenia/osteoporosis which indicated that biophosphanates actually make bones more brittle and talked about taking a vacation from them after 5 years of use.
I have been taking Actonel for about that long now for osteopenia which is present in my hip but not my spine. I have had some but not dramatic improvement in my bone density measures with the drug and exercise, and my cervical ADR is looking fine in X-rays, so I am wondering if it is time and if it would be safe to take a vacation.
Does anyone here with fusion or ADR take biophosphanates and if so, have you been advised to take a vacation from them?
Any thoughts on this?

Thanks.