Thanks for the replies.
I had to give up lectruing mathematics 10 years ago becuase of chronic headaches. I had a 1-4 day headache every 9 days.
I went on to imigran (later zomig) for 4 years. These drugs reduced me to a wreck. I was having a headache every 4 days. One morning I woke up with me symptoms (twitching all over, sever fatigue, etc.) I had a load of tests which shows nothing. Then I stopped the drug, went through a month of withdrawal headaches, then back to normal, i.E. 1-4 day headache every 9-14 days.
In the last 10 years, i've gone 3 week without a headache on just 2 occasions.
The headaches are less sever now. I just take codis (codeine and aspirin) but that doesn't give much relief and contributes to sickness.
Coffee is a great cure after a period of abstinence. Coffee has a greater effect on me than alochol.
Stress, late nights, too much computer time, alcohol, coffee (eventually) all increase frequency and severity.
I spent around £7000 on treatment, scans etc. All to no avail.
I reacted badly to anti-depressants and beta blockers.
No one had offered pizotifen before, so i'll give it a go.