Ragweed normally does not bother me. It was just such a large amount of it in a short period of time. Once I got some Zyrtec, after taking Benadryl and it not working, it started working and relieving the headache and the congestion. I still need to clear out about an acre of it, so I am going to take the Zyrtec before I start this time. Allergies do not normally bother me, and I am thankful for that.