Two more points of information for those of you either taking it or thinking about taking doxycycline
1). It is also used for rheumatoid arthritis because it has been found to have a profound anti inflammatory effect.
2) when used for arthritis it is sometimes close to I year before the patient starts to notice improvement and also during that time they sometimes feel a little worse before beginning to feel better. So persistence and patience is required There is also with rheumatoid a thought that some sort of bacteria may be a factor.
I think we must assume the same persistence must apply to Parkinson’s people giving it a try Good luck. Bubee.