What's the little pill inside Alavert D12?

Hello. I tried to split an Alavert D 12 hour extended release (Loratadine and pseudoephedrine) and found a tiny, white, round pill inside the main pill. (Round like a clock face, not a baseball). Can someone please tell me what exactly the small pill is? I cannot seem to find the information on the www and it's not on the box. Thanks for your help - much appreciated.