I'm not sure if the Doxy has much to do with the headaches.. I have been in your shoes for about
4 years now.. They were treating me for cluster headaches long before I was diagnosed.. When I was on Iv Rocephin my headaches went away.. I don't have them every day now buit still quite often.. God bless, Kevin
Ps I was taking 400mg of Doxy till it started making me lose my lunch.