It's not just in benadryl. It's a "sedating anthihistamine" that can be found in a bunch of over the counter medications called sleep aids.
What was reported is that she bought sleeping pills. If she bought sleeping pills then she bought it in pill form.
http://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/sleep-aids/art-20047860?pg=2
What was reported is that she bought sleeping pills. If she bought sleeping pills then she bought it in pill form.
http://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/sleep-aids/art-20047860?pg=2