I also take Singulair, which is for
Allergies, but my doctor told me that
allergies can bring on very bad headaches as well. I noticed that when I began both these medicines, my headaches decreased drastically. Before I started them, I got bad headaches that caused me to vomit, faint, and stay in bed for three days at a time. These happened twice or three times a month. Now, after taking my medicines for a year, I still get headaches sometimes, but not nearly as bad.