allergies
"The first 2 bottles I bought were amazing.  I took them at night as indicated; slept well and no morning 'hangover' and best of all no allergy symptoms.   The 3rd bottle however, feels as though I haven't taken anything.  I have been taking medication from this bottle for approximately 2 weeks.  Not sure if I got a bad batch or what.  I will buy a smaller bottle next time just to make sure."