"My experience with Drixoral Sinus was caused by my usual Sinus Infection.
Side Effect: 
A. After 1 week I started to: 1) lose weight and 2) headaches. Doctor could not determine cause of headaches/weight loss.
B. After 2 weeks I had intermittent severer headaches and had lost 60 pounds. Doctor could not determine cause of headaches/weight loss.
C. 3rd week: intermittent Headaches became unbearable.  Doctor could not determine cause of headaches and sent me to Hospital.
D. 4th week: Entered Hospital - I could no longer  stand light (daylight, room lights,etc.). In 18 days, hospital could not determine cause of headaches.
E. Second hospital identified my problem as &quot;Cluster Headaches&quot;. Took 6 months to recover."