All anahistamines do not cause a headache. When a med causes "you" symptoms be sure and let your doctor know so they can change to a different med.

I took Clariten and had a tight mesh like headache. I did not continue taking it. Later was given Zyrtec and it did not cause a headache.

Zyrtec is nor over the counter, give it a try.

What works for one does not always work for another.