E.C.H and feeling faint??

Hello,

I have recently been diagnosed with cluster headaches, after spending some time in hospital due to me losing consciousness and having severe stabbing pains in the top left of my head.

I was discharged on Verapamil and sumatriptan, but recently have been having the sudden feeling of faintness and stars in my eyes. I'm just wondering if this is common amongst other sufferers of C.H???? 

Kind regards,

Bruce Henderson.