I had my first dose on Feb 16th this year. I am just starting to feel a bit better (three months later) but still experiencing symptoms of pain in my feet, knees, wrists, and lower back. I also have sinus problems like you. It is a very slow recovery. The half life of this drug is 25 to 32 days (so I thought I would feel better in a month) but this drug continues to work on your bones for up to 4 months. I have only started to feel "marginally" better in the past two weeks. I would have one reasonably good day followed by the return of full symptoms. So far this week, I am "marginally" better but not close to being normal yet. I also, like you, am very sensitive to drugs. I also take the smallest dose possible to drugs like allergy medication. I have also had serious reactions to the smallpox vaccine and penicillin. My daughter is allergic to the tetanus vaccine. To be honest, this drug has caused me to be housebound and I have been unable to do even the basic routines of normal life. I will never take it again. Thank you so much for replying. I so appreciate that. I am not the only one. Thank You.