Hi Mikids: I took forteo for 2 years and did really well on it. The Dr that is treating me took me off of forteo for 2 months to test my calcium levels. I didn't have any negative reaction from going off of forteo, but I would ask your Dr what he/she thinks. Is there a reason why you aren't finishing the last 2 months of tx? We are all different in how we react to meds so it's hard to say what, if anything, would happen. The only thing I can think of is loosing out on the full tx, but I don't think that would be a problem. Some people take forteo for 18 mos and some 24, and I don't know if there is any difference between the results in the 2 groups. Have you read the Cleveland Clinincs pdf on forteo? If not it is an excellent read and easy to understand. This article answers most questions on forteo.
Good Luck...
http://www.ccjm.org/pdffiles/DEAL703.PDF